首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献，搜索用时 15 毫秒
1.
Leaf textures of four cabbage cultivars (T-520, Fuyu-nobori, Satsuki-ou, and Kinkei-201) harvested in winter and spring were evaluated. Acoustic vibration signals generated during penetration of four stacked cabbage leaves were measured using a novel texture measurement system. Texture was quantified using a texture index (TI). The TI of T-520 was higher than that of Fuyu-nobori and continually declined during the entire investigation period (between February and May). However, Fuyu-nobori's TI persisted after early April. This implied that Fuyu-nobori was superior to T-520 in terms of preservation of quality. Satsuki-ou showed either an equivalent or higher TI than T-520 in May. Kinkei-201 had a much lower TI than the other cultivars. TIs of T-520 and Fuyu-nobori stored at a 5 °C for 4 weeks were lower than those of samples without storage. This implied that low temperature storage did not effectively retain the texture quality of the cabbages.  相似文献   

2.
Evaluation of grape flesh texture by an acoustic vibration method   总被引：1，自引：0，他引：1  
Destructive acoustic vibrations produced by probe penetration were measured by a texture measurement device to clarify the characteristic flesh texture of nine grape cultivars and to examine methods for quantitative evaluation of grape flesh texture. The texture index (TI) is based on the energy density between 10 Hz and 3.2 kHz and was calculated using signals obtained with a piezoelectric sensor attached to a wedge-tipped probe. Using this index, we successfully classified nine grape cultivars according to flesh texture as crisp, non-crisp, or intermediate. The breaking force measured by a conventional puncture test did not identify these three types of texture. The breaking force was correlated with the TI calculated using 0-50 Hz vibrations but not with that calculated using the 10-3.2 Hz vibrations. This suggests that the former represents flesh firmness, and TI values measured at frequencies greater than 10 Hz evaluate characteristic textures of grape flesh that could not be evaluated using a load sensor installed in a conventional stress-strain analyzer.  相似文献   

3.
The development of sprouting tolerant spring and winter wheat varieties that retain dormancy in cool, wet conditions is a long-term objective in Hokkaido, Japan. A highly tolerant spring dwarf line, “OS21-5”, derived from “Tordo” × “Zenkoji”, was used to develop transgressive spring, “OS38” and “OS74”; and winter, “OW77”, “OW104” and “OW93” wheats. More recently, winter lines with improved agronomic performance, though still deficient in quality and scab resistance, have been identified. In general, germination percentage of mature grain at 10 °C was closely related to the mean temperature experienced during the 5 days prior to maturity (dough–yellow ripening stage) and to the capacity to maintain a high amylograph paste viscosity. Dormancy at 10 °C appeared to be determined by a combination of genotype and variation in sensitivity to temperature during the later stages of ripening. Genotypes such as “OS38” and ‘OWl04’ were both highly tolerant to germination at 10 °C and insensitive to temperature during ripening. By comparison, most of the other cultivars showed a similar, intermediate sensitivity to ripening temperature, and dormancy decreased as ripening temperature increased. Dormancy of‘RL4137’ at maturity, and to a lesser extent ‘Gifukomugi’ and ‘KKI354’, was very sensitive to ripening temperature and useful levels of dormancy only developed under cool ripening temperatures, mean temperature < 18–20 °C.  相似文献   

4.
The aim of this work was to investigate the loss of freshness of fresh-cut pineapple samples stored at different temperatures using non-destructive spectroscopic methods. Three lots of fresh cut pineapples (Ananas comosus L. cv. Golden Ripe, from Costa Rica), packaged in PVC trays (250 g) were analyzed during storage at three different temperatures (5.3, 8.6 and 15.8 °C). Loss of quality of these fruit was evaluated by chemical and microbiological parameters and using NIR and MIR spectroscopy. The FT-NIR spectra were acquired in reflectance mode directly on the slice of fresh-cut pineapple, over the range 12,500–3900 cm−1, while FT-IR spectra were collected over the range 4000–700 cm−1 using an horizontal ATR cell. Some chemical and microbiological parameters were also measured. Principal component analysis (PCA) was applied to the second derivative of the spectra to uncover molecular modifications occurring over the storage time. A clear discrimination between “fresh” and “old” samples was obtained and a stability time corresponding to the time of the initial loss of freshness was defined at each temperature. The stability times revealed by NIR spectroscopy were in good accordance with those evaluated by MIR. At each temperature the stability times (i.e. the initial loss of freshness times) defined by spectroscopic techniques (4–5 d at 5.3 °C, 3–4 d at 8.6 °C and 1 d at 15.8 °C) were associated with a mesophilic bacteria count ranging between 105 and 106 CFU g−1 and lower than the maximum limit for mesophilic bacteria (<5 × 107 CFU g−1) given by French hygienic regulations at consumption.These results show that NIR and MIR spectroscopy could support conventional techniques (chemical and microbiological analysis) in studying shelf-life of fresh-cut fruit. In particular these techniques define the initial loss of freshness time, indicating a product which rapidly will be no longer acceptable if stored beyond that time. The main advantage of using IR spectroscopic techniques is to rapidly draw a profile of the product related to its change in quality.  相似文献   

5.
In recent years several alternatives to the chemical control of postharvest decay have been examined but satisfactory levels of control, with a single system, have not been achieved yet. In the present study the results of an integrated postharvest approach are reported. Early and late harvested hybrid mandarin fruit “Fremont” and “Fairchild”, inoculated with Penicillium digitatum (Pers.:Fr.) Saccardo, were cured at 36 °C for 36 h with 95% RH and then fumigated with 0, 5, 15, 25, 50, 75 and 100 μL/L of acetic acid (AAC) vapours for 15 min. Following the treatments, fruit was stored at 20 °C and 80% RH to simulate a marketing period, and after 2 weeks the decay incidence and the visual appearance were evaluated. Curing or fumigations performed alone reduced decay with respect to untreated fruit, but the best control was achieved with combined treatments. For early harvested fruit the lowest decay percentage was obtained by using 75 μL/L with 8.3% and 2.1% of rots for “Fremont” and “Fairchild”, respectively, whereas for late harvested fruit the highest efficacy was observed using 50 μL/L (1.4% and 6.6%). Rind damage as pitting was observed only if fruit was treated with AAC alone at 100 μL/L.  相似文献   

6.
AFLP分子标记鉴别大白菜品种   总被引：11，自引：0，他引：11  
本试验采用AFLP技术,研究了90份来自7个不同栽培地区的大白菜品种材料。共筛选了20对引物,不同引物组合检测多态性谱带的能力有很大的差异,多态性谱带的数量从9条到32条不等。其中E—ACA／M—CTG是大白菜品种十分高效的引物组合,共产生7l条清晰的扩增带,其中有32条多态性谱带,多态性谱带的百分率为45．7％。通过该引物组合,能将90个品种全部区分开来。同时应用该引物组合检测2个大白菜杂交品种(北京新2号,京夏王)各10株,其中有1株北京新2号的谱带异常,其余同一品种不同单株的带型完全一致。表明AFLP标记用于研究品种指纹图谱,并鉴别品种是完全可行的。  相似文献   

7.
茹淑华 《中国农学通报》2010,26(14):282-287
采用土培试验研究了河北省20个白菜主要栽培品种吸收累积重金属Cd的特征和质量安全性。试验结果表明,在土壤加入同一Cd含量（1.0、5.0 mg/kg）的条件下,不同白菜品种地上部的Cd含量、吸Cd量和对Cd的富集系数均存在明显的差异(p<0.05) ,最高相差近3-4倍。按严格的蔬菜标准GB15201—94规定蔬菜中Cd最高允许限量标准0.05 mg/kg,种植白菜新北京三号、北京小杂60、太空三号和丰抗78在土壤Cd含量达到1.0 mg/kg时生产的白菜仍能符合食品安全标准。按GB2762—2005规定的叶菜类蔬菜中Cd最高允许限量标准,即使土壤Cd含量达到5.0 mg/kg时,种植的白菜新北京三号、北京小杂60和丰抗78仍是安全的。同一白菜品种的Cd富集系数是相对稳定,可以作为白菜安全生产时品种选择的重要指标。  相似文献   

8.
In cereals early vigour has been identified as an important trait affecting drought tolerance, nutrient uptake, weed competitive ability and yield. To further study how this trait has changed following years of barley (Hordeum vulgare L.) breeding for improved yield, landraces and cultivars from Sweden and Denmark were analysed for seedling root and shoot growth in hydroponics. The Swedish and Danish materials, 35 and 39 cultivars, respectively, represented the gene pool used during one hundred years of barley breeding. Besides seedling growth characteristics, straw length, harvest index and 1000-grain weight were studied in field trials over two years in Sweden, Norway and Latvia. From 1890 to 2005 straw length has decreased from 110 cm to 60–70 cm and harvest index has improved from 0.42 to 0.55, with highly significant linear relationships with year of introduction (r = −0.87 and r = 0.89, p < 0.001, for straw length and HI, respectively). Other traits like 1000-grain weight, heading and maturity date have been less affected. Seedling root weight has also decreased by 33.9 and 25% in Swedish and Danish germplasms, respectively. The decrease in shoot weight is similar to that of the root biomass. Seedling root length (longest seminal root) has decreased by about 10%, while specific root length (mm root mg−1 root dry matter) has increased by 28.6 and 19.0% in Swedish and Danish cultivars, respectively, indicating the development of finer roots in modern cultivars. There are indications that during recent years the deceasing trends have been broken by the introduction of new high yielding cultivars with improved seedling growth. In line with this there are also significant positive relationships between both seminal root length (r = 0.60–0.84, p < 0.05–0.001) and root weight (r = 0.62–0.78, p < 0.05–0.001) and grain yield from official variety trials carried out in Sweden in 1995–1999 and in Sweden and Denmark in 1999–2005. Reasons for the previously decreasing trends and the new trend in modern cultivars are discussed as well as the possibility of using hydroponics for selection.  相似文献   

9.
Summary Morphological characters, nuclear RFLPs, and isozyme analysis were used to study the similarity between 32 Portuguese Tronchuda cabbage and Galega kale landraces, and some cabbage cultivars traditionally grown in Portugal. Forty-six morphological characters observed in two consecutive years, RFLP data from 55 nuclear probes, detecting 291 polymorphic nuclear DNA restriction fragments, and allelic frequencies in 21 putative loci, generated by nine isozymes, were analyzed by the unweighted pair group method, using arithmetic averages (UPGMA), in order to present the results in the form of a phenogram. The three methods resulted in different clustering patterns of the 32 cole accessions. Morphological characters gave consistent clustering according to the traditional landrace definition and denomination, producing clear separation between Tronchuda cabbages and Galega kales. RFLPs were unable to separate Tronchuda cabbages from Galega kales and defined five landrace groups corresponding to their geographic origins rather than to their morphological similarities. Isozymes showed poor accession discrimination and an intermediate clustering pattern with some accessions being clustered according to their geographic origins and others according to their morphological similarities. Portuguese Tronchuda cabbages and Galega kales constitute a distinct and relatively homogenous group within Brassica oleracea, sharing the same genetic background. It is concluded that Portuguese coles have evolved independently from a common ancestor to the present cultivated forms. Portugal should be considered as an important region of domestication of specialized leafy coles.  相似文献   

10.
Summary RFLPs were used to study the genetic relationships of 31 Portuguese coles (Brassica oleracea L.) representing the different ecotypes or landraces grown in Portugal. Other cole crops such as Jersey kale, Chinese kales, common cabbages, broccolis and cauliflower, two nine-chromosome wild species, and one accession of turnip also were included to determine the evolutionary relationships of Portuguese coles to other related coles. Principal coordinates and cluster analyses were conducted using a package of computer programs and RFLP data from 55 nuclear DNA probes, detecting 291 polymorphic restriction fragments. The results showed that the 48 accessions clustered into five groups: (a) a dispersed group with turnip and the wild brassicas; (b) Chinese kales; (c) broccolis and cauliflower; (d) a disperse group including Algarve and Jersey kales, thousand head kale, cabbages, and savoy cabbage; (e) a large and compact group containing all Portuguese tronchuda cabbages and kales. This unique and closely related group containing Portuguese tronchuda cabbages and kales could be further divided into five subgroups corresponding to the major areas of cultivation. The phenetic groupings of Portuguese tronchuda cabbages and kales based on RFLP data corresponded more with their geographic origins (collecting sites) than with their morphological similarities. A mechanism involving geographic isolation and frequent intercrossing within local areas is proposed to explain genetic relationships among Portuguese tronchuda cabbages and kales.  相似文献   

11.
D. J. Ockendon 《Euphytica》1982,31(2):325-331
Summary A total of 31 S-alleles was found in a survey of 197 cabbage plants representing 11 cultivars of diverse type. Most of these S-alleles also occurred in either kale or Brussels sprouts, but five of them have not been found previously and apparently occur only in cabbage. A more detailed study of five cultivars of spring cabbage showed only 12 S-alleles in all, with 6–10 S-alleles in four older cultivars and only 3 S-alleles in the newer more highly selected cultivar. S2 was by far the commonest S-allele, as it is in B. oleracea as a whole. The highly recessive alleles S5 and S15 were not particularly common in cabbage and this may partly explain why the sib problem in F1 hybrids is apparently less in cabbage than in Brussels sprouts. Three cases were found in which an S-allele was completely recessive in both the stigma and the pollen. The problems for the breeder created by this rather unusual situation are discussed.  相似文献   

12.
Rambutan (Nephelium lappaceum Linn.) fruit cvs. Rongrien and See-Chompoo were stored in low (60–70%) and high (85–95%) relative humidity (RH) environments at 25 °C for 6 d. Changes in weight loss, browning index, phenols content and activities of phenylalanine ammonia-lyase (PAL), polyphenol oxidase (PPO) and peroxidase (POD) were measured. By d 6 of storage, browning was severe in the spinterns but slight in the peel of both cultivars. High RH delayed spintern browning but had only a small effect on peel browning. The phenols content and PAL activity in peel from both cultivars were generally higher than in the spinterns. RH had no effect on the changes in phenols during storage but PAL activity increased in the peel but not spinterns of both cultivars at d 4 of storage in low RH. The initial activities of PPO and POD in spinterns of both cultivars were higher than in peel. PPO activity in the spinterns of both cultivars was similar and was not affected by RH. The initial activity of POD was lower in the peel and the spinterns of Rongrien fruit but there were no clear responses to RH during storage. Higher activities of PPO and POD in the spinterns compared to the peel may also be a factor in the higher rates of browning of the spinterns.  相似文献   

13.
Two experiments were carried out at Pegões (central Portugal) to determine the potential N mineralization in a pulse amended disturbed and undisturbed soil incubated at several temperatures, and to evaluate for 2 years the yield and N2 fixation capacity of sweet lupine (Lupinus albus L. cv. Estoril) inoculated with a mixture of rhizobia strains or nodulated by indigenous soil bacteria and submitted to conventional tillage or no-till practices. A completely randomized block design for soil mobilization with three replicates was used for the laboratory study, and completely randomized blocks for inoculation and tillage treatments with four replicates were used for the lupine yield and N2 fixation experiment. Residue N immobilization occurred immediately after mature residue return to the soil independent of temperature, and was greater at 7 °C especially in the disturbed topsoil. Greater immobilization was also observed by doubling the amount of mature residue incorporated in the soil. This was expected since soil microorganisms would be in direct contact with the fresh organic matter and would be provided with more organic carbon under these circumstances. Nitrogen mineralization proceeded after 5 days of amendment. Potential N mineralization was higher at 25 °C than at 18 or 7 °C, for both conventional and no-till practices. At 25 °C, 42% of buried residue-15N was released over 210 days, at a smaller rate than 18 °C (49%) over 81 days. Lupine yield and N2 fixation capacity were similar in plots that were not inoculated and those receiving the mixture of three rhizobia strains. White lupine had an efficient symbiosis with indigenous soil rhizobia at pod-filling (>99%, >100 kg N ha−1 year−1) which was not affected by tillage. At this stage, plant residue including visible roots and nodules accounted for a soil N input of +96 kg ha−1 year−1 (91% of crop N), showing the large soil N benefit by the crop at this stage. The lupine residue at pod-filling stage can be used as a green manure under the conditions of organic farming systems. The apparent N “harvest” index of the pulse at pod-filling was only 9% though at maturity phase it should result in a higher value and the legume will show a lower fertilizer N value.  相似文献   

14.
成都平原主栽大白菜品种根肿病抗性的鉴定   总被引：1，自引：0，他引：1  
为明确成都平原地区主栽大白菜品种对根肿病的抗性情况,于2018年分别在成都市新都区、彭州市和崇州市3个试验田块对45个大白菜主栽品种采用田间抗鉴圃自然感染诱发法进行根肿病抗性鉴定,通过调查根部根肿病发病程度评价各品种的抗性。结果表明,在崇州自然病圃中表现为免疫的品种有4个,占总品种的8.9%;其余品种均表现为感病或高感,占比91.1%。彭州的结果显示,在所测定的45个品种中,免疫品种有6个;耐病品种有11个;剩余28个品种为感病或高感品种。而在新都发病田块中,只有2个品种表现为对根肿病免疫,16个品种表现为耐病,27个品种表现为感病或高感。部分品种在不同地区抗性结果表现不一致,试验鉴定到2个对根肿病免疫的优异品种,可为选育和应用抗性品种提供借鉴。  相似文献   

15.
甘蓝抽薹性状基因的分子标记定位   总被引：1，自引：0，他引：1  
选用耐未熟抽薹性状差异较大的甘蓝亲本材料2002-45和2002-49配制杂交组合,并构建F2分离群体.用60个SRAP引物组合对F2代分离群体进行PCR分析,共筛选到19个有多态性的引物组合,得到91条多态性条带.其中ME7EM2c和ME8EM2d两个标记与抽薹性状较紧密连锁,遗传距离分别为27.5 cM和31.7 cM.这两个标记可用于甘蓝耐未熟抽薹的分子标记辅助选择育种.  相似文献   

16.
Sea level quinoas are grown at low altitudes in Central and Southern Chile. Both sensitivity to photoperiod and response to temperature largely determine quinoa adaptation, but crop biomass production must be quantified to evaluate agronomic performance. The objectives of this work are: (i) to characterize development effects on leaf area evolution for genotypes of sea level quinoa differing in cycle length, (ii) to quantify the extinction coefficient (k) for photosynthetically active radiation (PAR) and radiation use efficiency (RUE) from emergence up to the beginning of grain filling and (iii) to identify which crop attributes related to canopy architecture should be considered to improve biomass production. Four cultivars (NL-6, RU-5, CO-407 and Faro) were cropped in Pergamino (33°56′S, 60°35′W, 65 m a.s.l.), Argentina, at three densities (from 22 to 66 plants m−2) in two consecutive years under field conditions with adequate water and nutrient supply. Thermal time to first anthesis and maximum leaf number on the main stem were linearly correlated (r2 = 0.87; p < 0.0001). Leaf area continued to increase during the flowering phase, notably in NL-6, the earliest genotype. There were significant differences in maximum plant leaf area between cultivars. Increasing density reduced plant leaf area but effects were comparatively small. Estimated k was 0.59 ± 0.02 across genotypes and was higher (p < 0.05) for 66 plants m−2. Values for RUE changed as cumulative intercepted PAR (IPAR) increased; at initial stages of development RUE was 1.25 ± 0.09 g MJ IPAR−1, but if cumulative IPAR was higher than 107.5 ± 10.4 MJ IPAR m−2, RUE was 2.68 ± 0.15 g MJ IPAR−1. That change occurred when leaf area index (LAI) and fraction of PAR intercepted were still low and ranged from 0.61 to 1.38 and from 0.33 to 0.51, respectively. No significant association was found with any developmental stage. Our results agreed to the notion that RUE variation during pre-anthesis phases is largely determined by LAI through its effect on radiation distribution within the canopy. Biomass production could be improved if periods of interception below 50% of incoming PAR were reduced to ensure high RUE. This seems to be possible in temperate areas both by the use of late genotypes with a higher number of leaves on the main stem and by early genotypes provided adequate plant density is chosen. Early increment in LAI and overlapping of the leaf area increase period with the flowering phase are desirable strategies for earliest genotypes to maximize yield.  相似文献   

17.
To maintain peach and nectarine quality after harvest, low temperature storage is used. Low temperatures induce physiological disorders in peach, but the effect of cold storage on the sensory quality of the fruit before it is damaged by chilling injury syndrome remains unclear. To evaluate the cold storage effect on the sensory quality two peach cultivars (’Royal Glory’ and ‘Elegant Lady’) and two nectarines (’Ruby Diamond’ and ‘Venus’) were harvested at a standardized firmness level and subjected to quality evaluations and sensory analysis at harvest and after storage at 0 °C for 35 d. For both time points, a supplementary ripening followed such that homogeneous flesh firmness and suitability for consumption was achieved.The fruit segregation through the Durofel firmness (DF), evaluated using a non-destructively method (Durofel device), allowed the formation of a uniform group of fruit in terms of flesh firmness (FF), showing scores between 45.1 and 55.9 N. The average FF in fruit ripened immediately after harvest was 22.9 N and 25.6 N in fruit ripened after cold storage for 35 d.The “acceptability” of fruit is highly correlated with “aroma”, “sweetness”, “juiciness”, “texture” and “flavor”. Only the “acid taste” parameter had no significant correlation with “acceptability” or with the other parameters evaluated.It is possible to conclude that the sensory quality and acceptability of peach and nectarine are characteristic of each cultivar and change, depending on the time elapsed after harvest. In general, it was confirmed that nectarine cultivars have a more consistent quality than peach cultivars.  相似文献   

18.
M. S. Chiang  W. K. Nip 《Euphytica》1973,22(2):393-398
Summary Leaf and root tissues of clubroot-resistant cabbage line 8–41 and cultivar Badger Shipper, and clubroot-susceptible cultivars Penn State Ballhead and Golden Acre were analysed for free amino acid content. There was no relationship between total free amino acid content and susceptibility to the disease. Alanine and asparagine contents were higher in the leaf tissue in resistant cabbage. Tyrosine content appeared to be higher in the root tissue of the resistant plants than that of susceptible ones.  相似文献   

19.
Research on tomato tolerance to salt stress indicates that thresholds of ECe for the decrease of yield and plant growth are moderately high and differ among varieties. Some results suggest that nitrogen fertilisation may help increase the threshold for yield reduction. Most literature data have been collected either in small-scale containers or in the open field and both systems are often subjected to disturbances making hypotheses difficult to test. A set of experiments was conducted in large containers in a rainout-shelter field setting to assess the response of a “cherry”-type tomato variety to irrigation with saline water and to test the hypothesis that salt stress may be mitigated through nitrogen fertilisation.Tomato hybrid ‘TOMITO F 1’ was irrigated with water at four levels of salinity (0.7, 2.5, 5.0, and 10.0 dS m−1 ECw) and three levels of nitrogen fertilisation (no added nitrogen = N0, 120 kg ha−1 = N120, and 160 kg ha−1 = N160) in factorial combination. Plant growth and water use were measured throughout the growth cycle, and gas exchange and leaf water potentials were measured at the fruit-growing stage. Two growing cycles were completed, one with high initial soil nitrogen (HN) and the second with low initial soil nitrogen (LN).No interaction was found between the application of nitrogen and plant response to saline irrigation. Plant growth and yield were affected by the saline treatments and less by nitrogen fertilisation, especially in the HN treatment.Irrigations with saline water resulted in increased values of soil salinity. Water use was lower with increasing soil and water EC, and the marginal reduction ranged from about 31 mm for each dS m−1 of water EC at low salinity to about 6 mm for each dS m−1 at high water EC.The marginal reduction in yield ranged from about 3.3 t ha−1 for each dS m−1 at low salinity water to less than 0.6 t ha−1 for each dS m−1 at high EC of irrigation water. Yield reductions were mainly due to lower fruit weight. Biomass values decreased as the salinity levels increased and fruit quality was improved in both cycles with increasing salinity.The hypothesis that nitrogen fertilisation could help tomato plants increase tolerance to salinity was not confirmed by data of this experiment and alterations induced by salinity in plant growth, yield and quality stabilised at high levels of water EC.  相似文献   

20.
The Japanese pear (Pyrus pyrifolia Nakai) is one of the most widely grown fruit trees in Japan, and it has been used throughout Japan’s history. The commercial production of pears increased rapidly with the successive discoveries of the chance seedling cultivars ‘Chojuro’ and ‘Nijisseiki’ around 1890, and the development of new cultivars has continued since 1915. The late-maturing, leading cultivars ‘Niitaka’ and ‘Shinko’ were released during the initial breeding stage. Furthermore, systematic breeding by the Horticultural Research Station (currently, NARO Institute of Fruit Tree Science, National Agriculture and Food Research Organization (NIFTS)) began in 1935, which mainly aimed to improve fruit quality by focusing on flesh texture and black spot disease resistance. To date, 22 cultivars have been released, including ‘Kosui’, ‘Hosui’, and ‘Akizuki’, which are current leading cultivars from the breeding program. Four induced mutant cultivars induced by gamma irradiation, which exhibit some resistance to black spot disease, were released from the Institute of Radiation Breeding. Among these cultivars, ‘Gold Nijisseiki’ has become a leading cultivar. Moreover, ‘Nansui’ from the Nagano prefectural institute breeding program was released, and it has also become a leading cultivar. Current breeding objectives at NIFTS mainly combine superior fruit quality with traits related to labor and cost reduction, multiple disease resistance, or self-compatibility. Regarding future breeding, marker-assisted selection for each trait, QTL analyses, genome-wide association studies, and genomic selection analyses are currently in progress.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号