Seed colour, seed weight and seed oil content in Linum usitatissimum accessions held by Plant Gene Resources of Canada     

A. Diederichsen    J. P. Raney 《Plant Breeding》2006,125(4):372-377

The purpose of this study was to investigate variation of and relationships among seed colour, seed weight and seed oil content in cultivated flax (Linum usitatissimum L. ssp. usitatissimum). Seed from 2934 flax genebank accessions recently grown at Saskatoon, SK, Canada, originating from 72 countries was used to describe the variation of the seed characters. The dominant seed colour of the accessions was medium brown (2730 accessions, 93.0%), followed by yellow (126 accessions, 4.3%). Based on single observations for all accessions, the overall mean and standard deviation was 5.95 ± 1.22 mg/seed for seed weight and 38.3 ± 1.74% for oil concentration. Within three infraspecific groups of flax, seed weight, oil concentration and oil amount per seed increased in the following order: fibre flax (convar. elongatum), intermediate flax (convar. usitatissimum), large‐seeded flax (convar. mediterraneum). The world collection exceeded the range of variation of seed weight and oil concentration found in 52 North American cultivars. There was a weak, positive association of higher oil concentration with higher seed weight (r² = 0.32; P < 0.001). Yellow‐seeded flax had a higher seed weight (6.31 vs. 5.92 mg/seed) and oil concentration (39.4% vs. 38.3%) than brown‐seeded flax. There was a tendency for yellow seed colour to be associated with higher oil concentration in all seed weight classes. The results suggested that indirect selection for increased seed oil concentration in flax is possible by selection for higher seed weight and yellow seed colour.  相似文献   

Comparison of genetic diversity of flax (Linum usitatissimum L.) between Canadian cultivars and a world collection     

A. Diederichsen   《Plant Breeding》2001,120(4):360-362

This study reports results of phenotypic measurements of genetic diversity in the world collection of flax maintained by Plant Gene Resources of Canada (PGRC) and compares the range of diversity in the world collection with the diversity observed in 19 Canadian registered flax cultivars. Morphological and seed‐oil characters were used to describe the phenotypic diversity in 2331 flax accessions. The plants were grown by PGRC at Saskatoon, Saskatchewan, Canada, in 1998 and 1999. The comparison between the Canadian cultivars and the world collection was based on single characters, as well as on character complexes by application of an existing intraspecific classification for the species. Considering single quantitative or qualitative character expressions, the Canadian cultivars represented a wide range in diversity for the species. The variation of characters Canadian plant breeders have selected for (e.g. plant height, seed weight, seed colour, petal colour, oil content) was reduced further than those characters not focused on by plant breeders (e.g. dotting of the sepals, style colour, ciliation of capsule septa, oil quality characters). A comparison of diversity based on the intraspecific classification proposed for flax by Kulpa and Danert, who described 28 botanical varieties, showed that all Canadian cultivars belong to two botanical varieties. This study demonstrates the usefulness of agrobotanical characterization of genebank collections for plant breeding and illustrates the application of the traditional method of intraspecific classification for comparison of gene pools.  相似文献   

Parametric and nonparametric measures of phenotypic stability in linseed (Linum usitatissimum L.)     

W. Adugna  M.T. Labuschagne 《Euphytica》2003,129(2):211-218

A combined analysis with three parametricand two nonparametric measures to assess G × E interactions and stability analyses toidentify stable genotypes of linseed across18 environments in Ethiopia wereundertaken. The combined analysis ofvariance for environments (E), genotypes(G) and G × E interaction was highlysignificant (p<0.01), suggestingdifferential responses of the genotypes andthe need for stability analysis. Theparametric stability measures ofcoefficient of variability and thestability variance showed that R12-N10D wasthe most stable genotype, whereascultivars' superiority measure indicatedChilalo to be the most stable cultivar.Like most of the parametric methods, thenon-parametric measures revealed thatR12-N10D had the smallest changes in ranksand thus was the most stable genotype incontrast to R12-D24C, which was unstableand the lowest yielder. A comparison of thefive stability measures showed that thecoefficient of variability, stabilityvariance and variance of ranks were similarin assessing the relative stability of thegenotypes, whereas cultivars' superioritymeasure deviated from the others. Thestability variance and variance of rankswere significantly rank correlated, andwere the best in determining thecomparative stability of linseed genotypes.The coefficient of variability was alsorelatively better than the cultivar'ssuperiority measure. Further studies ofrepeatability tests are, however, needed todetermine the best methods. The stabilitystatistics generally identified R12-N10D,followed by Chilalo, as the most stablevarieties, whereas R12-D24C and R11-M20Gwere the least stable varieties.  相似文献   

Yield Potential and Ecophysiological Traits of the Altamurano Linseed (Linum usitatissimum L.), a Landrace of Southern Italy     

L. Filippo D’Antuono  Francesco Rossini 《Genetic Resources and Crop Evolution》2006,53(1):65-75

Altamurano is a linseed landrace of southern Italy. Its area of origin is characterised by typical Mediterranean climate. Traditionally, Altamurano is spring sown, and mainly used as a feed integrator for animals. This landrace was evaluated during 2 years within varietal (16 modern varieties) and sowing date (15 sowings, from October to April, with ‘Antares’ as a control) trials. Growth analysis was carried out on two sowings. Seed yield was slightly lower than modern varieties, with advantages in late sowings. Reproductive efficiency, mean seed weight, harvest index and oil percentage were often higher than in modern cultivars. Altamurano was also characterised by early flowering, low vegetative growth, long leaf area duration, high light use efficiency during early grain filling phase, and relatively long grain filling period. All these features are connected with its adaptation to spring sowings in Mediterranean areas, characterised by early spring drought. Despite the decrease of its cultivation area from about 400 to less than 100 ha in the last 10 years, Altamurano is still present in the more traditional farms of the area as a heritage of past growing systems and historical adaptation to the environment.  相似文献   

Subject Index     

《Journal of Agronomy and Crop Science》2002,188(6):no-no

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油纤兼用型亚麻种间杂交技术研究   总被引：5，自引：0，他引：5  

米君 《河北农业科学》2004,8(3):20-24

在调查收集河北张北县和崇礼县野生亚麻种质资源的基础上 ,进行了野生亚麻的植物学特征和生物学性状鉴定 ,开展了亚麻野生种和栽培种的正交、反交、重复授粉、研磨花粉重复授粉及植物生长调节剂GA3、NAA、 2 4 D等滴注授粉后子房、杂交种的组织培养温室培育等试验研究 ,成功取得了种间杂交和子一代植株。  相似文献   

3种茎叶处理除草剂在胡麻田的最佳施药期研究     

姜延军  岳德成  柳建伟  石晓瑛#  史广亮  韩菊红  李青梅  胡冠芳  牛树君 《植物保护》2022,48(4):310-317

为了筛选出对胡麻安全、对杂草防效优良的茎叶除草剂最佳喷施时期,田间测定了400 g/L 2甲·溴苯腈EC 1 500 mL/hm~2、56%2甲4氯钠SP 1 200 g/hm~2和40%2甲·辛酰溴EC 1 275 mL/hm~2在不同时期喷施对胡麻生长发育的影响及对田间杂草的防效。通过对胡麻株高、鲜重、产量及控草效果综合分析看出：400 g/L 2甲·溴苯腈EC在胡麻株高5 cm、56%2甲4氯钠SP在胡麻株高2.5～5 cm、40%2甲·辛酰溴EC在胡麻株高5～10 cm喷施,对胡麻株高的抑制作用均能在成熟期降至微弱或无影响,对胡麻鲜重的抑制作用均能提早减轻至微弱甚至无影响;胡麻生物产量分别较人工除草增加9.66%、-6.25%～-1.77%和7.19%～9.97%,胡麻籽粒产量分别较人工除草增加5.39%、-0.86%～-0.47%和-0.56%～5.45%;对阔叶杂草株防效分别达到81.82%、51.46%～73.88%和51.91%～67.21%,对阔叶杂草鲜重防效分别达到98.99%、88.96%～96.33%和91.26%～94.47%。可见,参试除草剂在上述时期喷施对...  相似文献   

亚麻(Linum usitatissimum)铅胁迫转录组初步分析     

安霞  金关荣  陈杰  骆霞虹  陈常理  李文略  朱关林 《分子植物育种》2020,(10):3185-3191

亚麻的不同器官具有多种商业价值。随着土壤重金属污染情况日益加剧,有必要对亚麻响应重金属污染的分子机理进行研究。本研究采用二代测序技术,对亚麻在铅胁迫下地上部位样品进行转录组分析。通过对原始测序数据进行质量控制,并利用HISAT软件等对处理后数据拼接到亚麻参考基因组,获得了高质量Unigenes和拼接结果。对Unigenes进行序列比对、功能注释和分类、序列变异分析。结果显示,本次测序结果共获得43471条Unigene,并且这些Unigenes的大部分(89.6%)都完全比对到参考基因组的预测外显子区域。对测序结果的KOG和KEGG分析结果表明亚麻在铅胁迫条件下可能影响的通路信息。最后,对测序结果进行转录因子预测和序列变异分析,为后续针对亚麻响应重金属胁迫的相关研究提供了候选分子资源。  相似文献   

旱地油用亚麻氮磷钾平衡施肥指标体系研究   总被引：4，自引：0，他引：4  

闫志利  孙建军  高俊山  令鹏  王宗胜  贾海滨  李爱荣  牛俊义 《中国麻作》2012,(1):1-6,10

为构建旱地油用亚麻平衡施肥指标体系,采用农业部推荐的＂3414＂实验法,在河北省张家口市、山西省大同市和甘肃省白银市、平凉市及内蒙古自治区鄂尔多斯市、乌兰察布市等4省6市同步进行了大田试验。依据实验结果,拟合了氮、磷、钾三元平衡施肥模型,确定了实现油用亚麻籽粒最高产量、最佳产量目标下氮、磷、钾肥最高施用量、最佳施用量及其配比。结果表明,6实验区配合施用氮、磷、钾肥均可提高油用亚麻籽粒产量,白银、鄂尔多斯、乌兰察布3实验区施用氮肥产量增幅最大,张家口、大同、平凉3个试验区施用钾肥产量增幅最大。所拟合的三元平衡施肥模型均达显著相关水平,可运用于油用亚麻生产实践。在张家口、鄂尔多斯、乌兰察布、大同、平凉和定西6实验区,推行氮、磷、钾三元平衡施肥最大施用量及其配比,油用亚麻籽粒最高产量比基础产量（不施肥）分别增加40.53%、25.46%、71.15%、30.68%、16.21%和34.71%。推行氮、磷、钾三元平衡施肥最佳施用量及其配比,油用亚麻籽粒最佳产量比基础产量分别增加37.73%、23.47%、62.23%、26.07%、8.77%和24.68%。  相似文献   

我国胡麻施肥技术研究进展   总被引：9，自引：0，他引：9  

汪磊  严兴初  谭美莲 《湖北农业科学》2011,50(2):217-220

论述了我国胡麻施肥技术研究状况,对胡麻吸肥规律、施肥时期、施肥量、配方施肥等进行了详细论述,探讨了我国目前胡麻施肥的研究水平,并对未来胡麻施肥技术发展进行了展望。  相似文献