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源于硬粒小麦-节节麦人工合成种的小麦新品种川麦38抗条锈性及遗传分析 总被引：8，自引：1，他引：8
利用硬粒小麦-节节麦人工合成种与四川小麦杂交、回交,育成高抗条锈小麦新品种川麦38(99-607)。为明确川麦38抗条锈性状的遗传规律,将川麦38与绵阳26、绵阳335、SY95-71、川育12等5个高感条锈小麦品种杂交,获得杂种F1、F2群体;利用条中32对抗×感杂种F1、F2群体接种鉴定抗性分析表明,川麦38对条锈病新小种的抗性受一对显性基因控制。将川麦38与含Yr13的德国小麦8661及源于硬粒小麦-节节麦人工合成种的3个抗病新品种(川麦42、川3736、复小穗小麦)杂交,分析川麦38与4个抗病品种的抗性基因等位性,结果发现抗×抗F2群体中均分离出一定比例的感病单株,表明川麦38与德国小麦(Yr13)、川麦42、川3736、复小穗小麦等的抗锈基因不等位,为不同的抗性基因。 相似文献
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小麦新品种川麦42抗条锈病性遗传分析 总被引：10，自引：2，他引：10
条锈病是我国小麦最重要的病害之一,严重威胁小麦生产。川麦42是利用硬粒小麦-节节麦人工合成的高抗条锈病小麦新品种。为明确川麦42抗条锈性遗传基础,将川麦42分别与高感条锈小麦品种绵阳26、绵阳335杂交和回交,获得杂交F1、F2、BC1群体,其中,川麦42×绵阳26、川麦42×绵阳335F2群体分别为208和337株,川麦42/绵阳26//绵阳26、川麦42/绵阳335//绵阳335BC1群体分别为171和216株用于抗性遗传分析。利用条锈菌小种条中32号(CYR32)对抗感杂交的F1、F2和BC1群体接种,结果显示,所有F1代对条中32都表现免疫或高抗,F2代群体中抗∶感分离比例均符合3R∶1S理论比例,BC1群体抗∶感分离比也符合1R∶1S理论比例,说明川麦42对条中32的抗性由1对显性基因控制。 相似文献
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“川麦42”和“川麦43”是源于CIMMYT硬粒小麦-节节麦人工合成种的姊妹系,具有高产、高抗条锈等特征。本实验利用小麦A、B、D基因组上的91对引物对“川麦42”和“川麦43”进行了SSR分子标记比较分析。结果表明,分析的91个SSR标记位点中有61个位点“川麦42”与“川麦43”多态性一致,占位点数的67.03%;有30个位点两个品种存在多态性差异,占位点数的32.97%;30个差异位点在A、B和D三个基因组的分布频率(占该基因组被检测位点数)不一致,其中A基因组分布最多,B基因组分布最少,其顺序为A>D>B。 相似文献
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Eleven winter rapeseed inbred lines (I4) were characterized according to isozyme banding patterns from seven polymorphic enzyme systems. All lines could be qualitatively and quantitatively distinguished using two enzyme systems, shikimate dehydrogenase (SDH) and diaphorase (DIA). Genetic distances were calculated among lines and 15 selected two-line hybrids were planted as experimental synthetics in field-trials. Syn-0 populations produced seed yields between 0.4% lower and 12.9% higher than the mean yields of the respective parental lines. Syn-1 seed yields were 11–24.1% higher than the respective parental lines and the yield improvement was positively correlated with the genetic distance between the parental lines. This tendency suggests that genetic distances between cross components, calculated from isozyme polymorphism, can be used in prognosis of yield performance of synthetic rapeseed cultivars. Isozyme analysis was also applied to study fertilization behaviour in line mixtures, and differences among parental lines were observed with regard to the tendency for self-pollination or out-crossing. The partially very high outcrossing rate suggests the possible existence of a self-incompatibility system. 相似文献
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