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玉米产量性状与产量的灰色关联度分析 总被引:3,自引:0,他引:3
应用灰色关联度分析法对11个玉米单交种的6个数量性状与籽粒产量进行分析,结果表明:玉米单交种的产量与各产量性状关联度的大小顺序为:出籽率>行粒数>穗粗>百粒重>结实长>粒行数.目的是为高产玉米杂交种的选育提供科学依据. 相似文献
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基于灰色关联度分析和DTOPSIS法的肾茶种质资源综合评价 总被引:1,自引:0,他引:1
为了筛选出综合性状优良的肾茶种质,采用灰色关联度分析和DTOPSIS法分析相结合的方法对15份肾茶种质资源进行评价。结果表明,基于灰色关联度分析的肾茶参评种质各指标在其综合性状评价中关联度顺序依次为熊果酸干叶茎比迷迭香酸株高茎粗单株干重,灰色关联度和DTOPSIS法对肾茶种质资源评价结果显示,Cs8、Cs2、Cs15种质排序在前3位,表明它们综合性状好,与理想种质最接近,在进一步优良品种选育中优先考虑。2种分析方法综合评价排序结果存在一定差异,且灰色关联度法加权关联度ri’差异最大为23.27%,种质间差异小,DTOPSIS法利用了灰色关联度法中的权重ωk值,种质间接近度Ci的差异最大为55.33%,差异大,可以优先考虑此方法给出的结论。 相似文献
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烤烟新引品种的灰色关联度分析 总被引:3,自引:0,他引:3
为筛选出适合湘东烟区生态条件并达到优质、适产、抗性好的烤烟新品种,利用灰色关联度分析法,对2005-2006年引种浏阳的10个省外烤烟新品种(系)的主要性状进行了综合分析。结果表明,依据品种(系)的灰色关联度顺序进行的综合评估与各品种的实际表现相一致。云烟203的产量、农艺性状、抗病性、品质等综合性状表现最好,其次为云烟202和金海一号,中烟90、中烟201、豫烟3号、V2和NC82表现较差,不适宜在浏阳烟区推广。与等权关联度相比,加权关联度结果与品种(系)的实际表现更为吻合。 相似文献
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冬小麦主要农艺性状的灰色关联度分析 总被引:6,自引:1,他引:5
应用灰色关联度分析方法,对乌什垦区冬小麦产量与10个性状的关联度进行了分析。结果表明:关联度大小依次为千粒重r6〉收获穗数r7〉单穗重r5〉粒质r8〉株型r3〉穗长r2〉穗粒数r4〉生育期r10〉株高r1抗倒性。与产量形成关系密切的主要性状为千粒重、收获穗数、单穗重,并明确了各性状之间的相互关系,为小麦及时更替提供依据。 相似文献
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应用灰色关联度法对晋北地区引种的12个苦荞品种的主要农艺性状进行分析与综合评价。结果表明:引种的苦荞品种中综合生产性能表现较好的是晋荞5号、冼马选1号、KQ-1-6、西农9909和云苦5号;各农艺性状的权重顺序为生育期>主茎分枝数>株高>主茎节数>千粒重>产量,结果可为晋北地区苦荞引种和推广提供科学依据。 相似文献
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玉米6个产量性状与产量的灰色关联度分析 总被引:5,自引:1,他引:5
应用灰色关联度分析法,对玉米12个组合的6个主要数量性状与籽粒产量进行分析.结果表明:玉米单交种的产量与各产量性状关联度的大小顺序为:结实长>百粒重>穗位>株高>生育期>行数.目的是为高产玉米杂交种的选育提供科学依据. 相似文献
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介绍了运用冷冻干燥技术进行速溶蛋花汤的加工,研究了生产工艺、特点以及影响产品质量的主要因素。试验表明,采用冷冻干燥技术加工的速溶蛋花汤,具有营养丰富、风味独特、方便快捷等特点。 相似文献
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南瓜降糖功能及其系列食品加工技术 总被引:3,自引:0,他引:3
阐述了南瓜在糖尿病辅助治疗方面的功能特性,介绍了南瓜降糖主要制品南瓜全粉、南瓜脆片、南瓜果酱和南瓜肉汁的工艺流程和操作要点。 相似文献
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母猪繁殖障碍成因分析 总被引:3,自引:0,他引:3
繁殖障碍是导致母猪淘汰的最主要因素,直接造成母猪非生产天数延长,繁殖猪群生产效率降低,严重影响猪场的经济效益。本文作者对引起母猪繁殖障碍的多方面因素,包括营养因素(如饲养水平、饲料品质、断奶日龄)、环境因素(如温度、湿度、通风、光照)、疫病因素、生产技术及管理因素进行了详细阐述。 相似文献
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DENG Zhao-jing 《保鲜与加工》2005,(1):153-156
A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed. 相似文献
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香蕉是热带亚热带发展中国家重要的粮食作物和碳水化合物来源。但近年来,香蕉生产受到严重的病虫危害。大多数香蕉栽培品种是三倍体,生长周期长,而且不孕。由于没有种子,给繁殖和育种带来一定的困难。遗传转化技术的发展为香蕉品种的改良提供了一种有效的手段。香蕉的遗传转化方法有电激法、基因枪法、农杆菌介导法等。农杆菌介导法的应用是香蕉品种改良的一个重大突破。香蕉遗传转化的外植体也发展到多种,有原生质体,胚性细胞悬浮系,分生组织,以及横切薄片等。近几年,随着分子生物学的发展,出现了转化效率更高,重复性更好的香蕉遗传转化技术。如农杆菌和基因枪结合法,离心辅助农杆菌介导法、真空渗透技术等。这些新技术新方法的出现,必将推动香蕉产业高速发展。 相似文献
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Automobile comfort dynamic simulation is necessary when we predict and evaluate the comfort of a automobile or optimize performance of automobile. The nine DOF vibration model of automobile is established , which acts root mean square value of body in multiple work conditions as comfort evaluation indices. Based on the comfort simulation, the Hongyan 1160 is predicted in the way of comfort. The programmes can be used in many different automobiles . The computational result indicates that the model can simulate vibration of automobile truly. It is significant to research automobile comfort evaluation to optimize performance of automobile and comfort simulation .The computational program can be applied to optimize or simulate which has some reference value. 相似文献
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Efficiency of water use of early plantings of sunflower 总被引:4,自引:0,他引:4
M. Auxiliadora Soriano Francisco Orgaz Francisco J. Villalobos Elías Fereres 《European Journal of Agronomy》2004,21(4):465-476
Rain fed crop production in Mediterranean environments depends to a large extent on strategies that avoid the intense summer drought. Early plantings of sunflower have given consistently higher yields in such environments, but the basis for such yield increases has not been explored. We conducted two field experiments at Cordoba (Spain) to investigate the effects of an early and a late planting date on the components of water-limited crop productivity; namely, water use (T), water use efficiency (TE) and harvest index (HI) of sunflower. The results were generalized by simulating rain fed sunflower yields, under early (1 January) and late (15 March) plantings, for a 25-year period with the aid of a simulation model of the Ceres type (OILCROP-SUN) which has been validated in Cordoba. Experimental seed yields of early plantings in 1989 and 1996 were 2.0 and 3.0 t ha−1, while late plantings yields were 1.3 and 2.4 t ha−1, for the 2 years. Average simulated yields were 2.7 ± 1.1 and 1.9 ± 0.7 t ha−1 for early and late plantings, respectively. For the 2 years, T of early plantings was higher than that of late plantings, but the response of TE and HI to planting date was not the same in the two experiments. In the simulation exercise, T and TE of early plantings were consistently higher than those of late plantings, while there were no differences in the HI for the two planting dates. We conclude that early plantings of sunflower increase rain fed yields by increasing both T and TE, while the impact of planting date on HI very much depends on the crop water stress pattern, which is quite variable from year to year even in the predictable Mediterranean environment. 相似文献
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The cotyledon and hypocotyl of eight varieties of alfalfa( Medicago sativa L. )are used to study the effect of different cultivation procedures and genotypes on embryogenic callus and embryoid induction,plant development and transplant of alfalfa.The varieties of alfalfa with high embryoid induction rate and high differentiation rate are screened. A high frequency regeneration system for alfalfa tissue culture is established:which is benifical to the gene transformation of alfalfa. 相似文献