共查询到20条相似文献，搜索用时 62 毫秒
1.
甜菜多倍体新品种甜研309的选育 总被引：6，自引：5，他引：6
甜研３０９是由四倍体甜４２７与二倍体甜２１１杂交而成的普通多倍体品种。该品种具有抗病性较强、含糖较高、丰产性稳定、适应性广等优点。区试中，平均根产量３０５６２ｋｇ／ｈｍ２，分别比统一对照甜研３０２、当地对照增产５．０１％、１１．１２％；平均含糖率１５．１８％，分别较上述对照提高０．１６度、０．６７度；产糖量４６６１ｋｇ／ｈｍ２，分别较上述对照提高５．８２％、１７．４７％。甜研３０９在“八五”国家甜菜育种攻关项目中的丛根病品系鉴定试验中，在内蒙、宁夏、甘肃、新疆等试验点表现出较强的耐丛根病性。 相似文献
2.
咸阳市１９９８年推广穴播地膜小麦２７３４．６７ｈｍ＾２,平均产量３８６２．５ｋｇ／ｈＭ＾２,较露地对照增产１３４７ｋｇ／ｈｍ＾２,增产５３．５％,平均增益１０９３．８元／ｈｍ＾２,总增益３０３．１万元,示范膜际栽培模式１３．３ｈｍ＾２,增产１４８．３７％,一般在海拔较高,积温一不足的地区及田茬田块以推广穴播模式为主;在海拔相对照较低,热量较好的地区以推广膜际栽培为主,在技术上,要着重抓好精细整地, 相似文献
3.
4.
高糖兼抗病型甜菜多倍体品种甜研303甜研304简介 总被引：1，自引：0，他引：1
甜菜新品种“甜研３０３、甜研３０４”获农业部１９９８年度科技进步一等奖。这两个品种均属于高糖抗病型品种,其共同特点是：１．含糖率高。甜研３０３在全国８省区的区域试验中,平均含糖１６．２度,比当地对照增加含糖２．２度,含糖率居各地参试材料第一位。甜研３... 相似文献
5.
高产优质杂籼新组合K优818 总被引：1，自引：0，他引：1
Ｋ优８１８由江苏里下河地区农科所以三系不育系Ｋ１７Ａ与恢复系Ｒ８１８配组而成 ,１９９７年定型 ,１９９８年参加杂籼品比试验 ,１９９９～２０００年参加江苏省区域试验和生产试验 ,２００１年通过江苏省审定定名。一、特征特性１．产量高１９９８年参加杂籼品比试验 ,平均单产１０．２ｔ／ｈｍ２,比对照协优６３增产１９．４９% ,１９９９-２０００年参加江苏省杂籼区试 ,平均单产９．２３ｔ／ｈｍ２ ,较对照汕优６３增产９．９３% ,达极显著水平。２０００年参加江苏省杂籼生产试验 ,平均单产９．５６ｔ／ｈｍ２ ,比对照汕优６３增产… 相似文献
6.
南系1号的选育及对水稻育种亲本选择的探讨 总被引：1，自引：1，他引：0
南系１号是用梧农１号／湘矮早９号中间材料，与１１９复交选育而成的中熟早籼新品种。１９９４年育成，１９９５～１９９６年进入品比试验，１９９７年参加省区试，１８个试点平均单产６－３８３ｔ／ｈｍ２，居参试品种第一位，比对照种１１９增产９－８２％，达极显著水平。１９９８年省区试续试，１７个参试点平均单产５－８４７ｔ／ｈｍ２，仍居参试品种第一位，比对照１１９增产１２－９６％，达极显著水平，两年３５个参试点次有３３个点次比对照增产（见表１），是福建省历届品种区试中首次连续两年增产点数跨越９４％大关，成为福建… 相似文献
7.
甜菜多系杂交种甜研八号的选育 总被引：2，自引：2，他引：0
甜研八号是以ＫＨ为骨干系,与４个自交系按４∶１（自交系等量）配制的多系自然杂交组合（代号ＫＨ－５）,生产上利用一代杂交种。１９９１～１９９５年参加全国１３个网点区域试验和４个点两年（１９９４～１９９５年）的生产试验,平均根产量为４２６３８．６ｋｇ／ｈｍ２和４３７８２．０ｋｇ／ｈｍ２,前者比对照增产９．０％,后者与对照持平（－０．１％）,平均含糖率为１６．６％和１６．１％,比对照提高１．３２度和１．３５度,平均产糖量为７１０１．９ｋｇ／ｈｍ２和７００３．７ｋｇ／ｈｍ２,比对照增产２２．９％和９．５％;１９９３～１９９７年参加黑龙江省１０个点区域试验和６个点两年（１９９６～１９９７年）的生产试验,平均根产量、含糖率和产糖量分别比对照提高１０．２％和２７．８％、０．８度和０．６４度、１８．５％和３４．９％。抗褐斑病和根腐病,较对照低０．８级,根腐病罹病率５．５％,亦较耐立枯病和丛根病。适宜在黑龙江省的佳木斯、齐齐哈尔、哈尔滨、大庆,内蒙古的中部、东部,宁夏的银川,甘肃的黄羊镇,新疆的石河子、和静等地种植。 相似文献
8.
东北地区部分玉米杂交种的丰产性,稳定性和适应性 总被引：5，自引：1，他引：4
对东北地区１９９２年玉米杂交种区域试验产量结果做了丰产性，稳定性和适应性分析：龙１４２，哲单１０和长单４２五点平均产量分别为１０５０９．７ｋｇ／ｈｍ＾２，１０６２５．８ｋｇ／ｈｍ＾２和１０５２３．１ｋｇ／ｈｍ＾２，较对照四单８分别增产１２．３％，１３．４％和１２．５％；较对照龙单９增产分别为１４．８％，１６．１％和１５．０％。且稳定性和适应性好于其它品种，可在各参试占地区大面积推广种植。 相似文献
9.
甜菜丛根病综合防治技术研究Ⅱ.综合防治技术示范 总被引：2，自引：1，他引：1
对３个引进品种在不同病害程度条件下示范试验结果表明,在重病绝产地,平均根产量达６７ｔ／ｈｍ＾２,增产３７％～４７０％,Ｂｅｔａ４０３５和Ｂｅｔａ４７７６的含糖率高达１７％以上;在中度病田,平均根产量为８０．９ｔ／ｈｍ＾２,增产２１０％～２６０％,含糖平均在１５．１％;在轻病地,平均根产量高达８７．９ｔ／ｈｍ＾２,增产１５３％～１６０％,含粮率平均为１５．２％。真实地反映了这项综合防治技术的可行性和引进品种的适应性及稳定性,展示了良好的应用前景。 相似文献
10.
Ⅱ优１５是福建省南平市农科所用Ⅱ３２Ａ与大粒香１５配组而成的杂交籼稻新组合。经１９９７～１９９８年试验示范，表现高产稳产、熟期适中、米质优、米饭带清香味、抗稻瘟病且制种产量高。１９９９年３月通过福建省南平市农作物品种审定委员会审定。１ 产量表现１９９７年和１９９８年参加南平市晚稻区试，产量分别为６－３０ｔ／ｈｍ２和７－０８ｔ／ｈｍ２。１９９７年比对照汕优６３增产３－５％，达显著；１９９８年比对照汕优桂３３增产８－５％，达极显著。１９９７年，建阳市良种场双晚试种０－３３ｈｍ２，平均产量７－０９… 相似文献
11.
12.
《Journal of Crop Improvement》2013,27(2):81-114
Summary The efficiency of N fertilizers is usually poor; often less than 50% of the applied N is taken up by the crop. This review focuses on various N fertilizers with respect to the significance of different N loss pathways, namely (i) ammonia volatilization, (ii) dinitrogen and nitrogen oxide emissions, and (iii) nitrate leaching. Further, the significance of biological N immobilization, ammonium fixation and, finally, the impact of nitrate vs. ammonium uptake on crop yield are also discussed. The reviewed literature shows that N fertilizers may differ markedly in their susceptibility to losses. There is, however, considerable scope to improve N efficiency of each N source by proper N management practices. 相似文献
13.
Lakshman Lal 《Potato Research》1987,30(2):329-334
Summary The effects of the leaves of five plant species, one from each of the generaAmbrosia, Anemone, Eupatorium, Eucalyptus andLantana, on potato tuber moth were investigated under indigenous storage conditions at the Central Potato Research Station, Shillong
(1800 m above sea level). Their action was compared with that of a biological insecticide (spores ofBacillus thuringiensis), a chemical insecticide (carbaryl), and an untreated control. The data collected after six months storage on tuber damage,
sprout damage and the rotting indicated that the leaves ofLantana aculeata provided most protection to the tubers, reducing damage from over 70% in the check to below 5%, and sprout damage from over
45% to below 3%. Next best wasEucalyptus globulus followed byB. thuringiensis. They may be used on tubers stored for table use or for seed as they had no adverse effect on germination or on the yield
of a subsequent crop. 相似文献
14.
15.
Joseph E. Laferriere Charles W. Weber Edwin A. Kohlhepp 《Plant foods for human nutrition (Dordrecht, Netherlands)》1991,41(3):277-282
Teas of plant origin traditionally consumed by the Mountain Pima of Chihuahua, Mexico, were analyzed for mineral nutritional content. Fe, Cu, Zn, Ca, and Mg composition was determined for native teas made from shoots ofTagetes lucida, T. filifolia, Elytraria imbricata, andHolodiscus dumosus, and from root xylem ofCeanothus depressus andPhaseolus ritensis. Native uses of these teas are also described. 相似文献
16.
Novel food and non-food uses for sorghum and millets 总被引：4，自引：3，他引：4
Sorghum and millets have considerable potential in foods and beverages. As they are gluten-free they are suitable for coeliacs. Sorghum is also a potentially important source of nutraceuticals such antioxidant phenolics and cholesterol-lowering waxes. Cakes, cookies, pasta, a parboiled rice-like product and snack foods have been successfully produced from sorghum and, in some cases, millets. Wheat-free sorghum or millet bread remains the main challenge. Additives such as native and pre-gelatinised starches, hydrocolloids, fat, egg and rye pentosans improve bread quality. However, specific volumes are lower than those for wheat bread or gluten-free breads based on pure starches, and in many cases, breads tend to stale faster. Lager and stout beers with sorghum are brewed commercially. Sorghum's high-starch gelatinisation temperature and low beta-amylase activity remain problems with regard to complete substitution of barley malt with sorghum malt . The role of the sorghum endosperm matrix protein and cell wall components in limiting extract is a research focus. Brewing with millets is still at an experimental stage. Sorghum could be important for bioethanol and other bio-industrial products. Bioethanol research has focused on improving the economics of the process through cultivar selection, method development for low-quality grain and pre-processing to recover valuable by-products. Potential by-products such as the kafirin prolamin proteins and the pericarp wax have potential as bioplastic films and coatings for foods, primarily due to their hydrophobicity. 相似文献
17.
M. I. Siri P. Villanueva M. J. Pianzzola L. Franco Fraguas G. Galván M. Acosta F. Ferreira 《Potato Research》2004,47(3-4):127-138
Summary The in vitro antimicrobial activity of extracts from accessions ofSolanum commersonii Dun. collected in the south of Uruguay was investigated against five microorganisms including the pathogenRalstonia solanacearum. A total of 30 extracts corresponding to organic and aqueous extracts were studied. Interestingly, most of the positive results
for growth inhibition were againstR. solanacearum. The extracts were also analyzed for the presence of glycoalkaloids and lectins. Six of the ten aqueous extracts showed lectin
presence and a wide variation in the type and amounts of glycoalkaloids, was found. Results indicate that there is no clear
relationship between the antimicrobial activity against the five microorganisms screened and the presence or amounts of lectins
and glycoalkaloids, traditionally regarded as possible antimicrobial metabolites in theSolanum genus, which indicates the presence of as yet unidentified antimicrobial compounds. 相似文献
18.
Alejandro Carlos Tozzini María Fernanda Ceriani María Verónica Saladrigas H. Esteban Hopp 《Potato Research》1991,34(3):317-324
Summary Clones derived from thirty-one different accessions (nineteen of Argentine origin) belonging to eightSolanum species were screened for resistance to infection by potato virus X strain cp (PVX cp) by mechanical inoculation of plantlets
that had been micropropagated in vitro. Estimates of PVX multiplication obtained by enzyme linked immunosorbent assay and
slot blot nucleic acid hybridization allowed the identification of resistant clones derived from five accessions belonging
toS. commersonii S. oplocense, S. sparsipilum andS. tuberosum andigena. Resistant genotypes supported PVX concentrations 5 to 15 times smaller than did the susceptible control cultivar Spunta.
Graft inoculation test confirmed the presence of extreme resistance similar to that conferred by the ‘immunity’ gene X1 (also called RXact). 相似文献
19.
Rita Favas Janaína Morone Rosrio Martins Vitor Vasconcelos Graciliana Lopes 《Marine drugs》2022,20(3)
The loss of density and elasticity, the appearance of wrinkles and hyperpigmentation are among the first noticeable signs of skin aging. Beyond UV radiation and oxidative stress, matrix metalloproteinases (MMPs) assume a preponderant role in the process, since their deregulation results in the degradation of most extracellular matrix components. In this survey, four cyanobacteria strains were explored for their capacity to produce secondary metabolites with biotechnological potential for use in anti-aging formulations. Leptolyngbya boryana LEGE 15486 and Cephalothrix lacustris LEGE 15493 from freshwater ecosystems, and Leptolyngbya cf. ectocarpi LEGE 11479 and Nodosilinea nodulosa LEGE 06104 from marine habitats were sequentially extracted with acetone and water, and extracts were analyzed for their toxicity in cell lines with key roles in the skin context (HaCAT, 3T3L1, and hCMEC). The non-toxic extracts were chemically characterized in terms of proteins, carotenoids, phenols, and chlorophyll a, and their anti-aging potential was explored through their ability to scavenge the physiological free radical superoxide anion radical (O2•−), to reduce the activity of the MMPs elastase and hyaluronidase, to inhibit tyrosinase and thus avoid melanin production, and to block UV-B radiation (sun protection factor, SPF). Leptolyngbya species stood out for anti-aging purposes: L. boryana LEGE 15486 presented a remarkable SPF of 19 (at 200 µg/mL), being among the best species regarding O2•− scavenging, (IC50 = 99.50 µg/mL) and also being able to inhibit tyrosinase (IC25 = 784 µg/mL), proving to be promising against UV-induced skin-aging; L. ectocarpi LEGE 11479 was more efficient in inhibiting MMPs (hyaluronidase, IC50 = 863 µg/mL; elastase, IC50 = 391 µg/mL), thus being the choice to retard dermal density loss. Principal component analysis (PCA) of the data allowed the grouping of extracts into three groups, according to their chemical composition; the correlation of carotenoids and chlorophyll a with MMPs activity (p < 0.01), O2•− scavenging with phenolic compounds (p < 0.01), and phycocyanin and allophycocyanin with SPF, pointing to these compounds in particular as responsible for UV-B blockage. This original survey explores, for the first time, the biotechnological potential of these cyanobacteria strains in the field of skin aging, demonstrating the promising, innovative, and multifactorial nature of these microorganisms. 相似文献
20.
Alejandro M. S. Mayer Abimael D. Rodríguez Orazio Taglialatela-Scafati Nobuhiro Fusetani 《Marine drugs》2013,11(7):2510-2573
The peer-reviewed marine pharmacology literature from 2009 to 2011 is presented in this review, following the format used in the 1998–2008 reviews of this series. The pharmacology of structurally-characterized compounds isolated from marine animals, algae, fungi and bacteria is discussed in a comprehensive manner. Antibacterial, antifungal, antiprotozoal, antituberculosis, and antiviral pharmacological activities were reported for 102 marine natural products. Additionally, 60 marine compounds were observed to affect the immune and nervous system as well as possess antidiabetic and anti-inflammatory effects. Finally, 68 marine metabolites were shown to interact with a variety of receptors and molecular targets, and thus will probably contribute to multiple pharmacological classes upon further mechanism of action studies. Marine pharmacology during 2009–2011 remained a global enterprise, with researchers from 35 countries, and the United States, contributing to the preclinical pharmacology of 262 marine compounds which are part of the preclinical pharmaceutical pipeline. Continued pharmacological research with marine natural products will contribute to enhance the marine pharmaceutical clinical pipeline, which in 2013 consisted of 17 marine natural products, analogs or derivatives targeting a limited number of disease categories. 相似文献