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以抗条锈病基因 Yr10的供体亲本 Moro作参照,用 6个 Pst I端引物和 10个 TaqI端引物对抗条锈病基因Yr10的近等基因系和轮回亲本Avocet S进行了AFLP分析,共扩增出约4200条可分辨的带,其中5条为稳定的差异带.用Yr10基因的供体亲本Moro和感病品种铭贤169杂交产生的F2代分离群体,对5个特异条带与目的基因的遗传连锁性进行了初步分析,发现特异条带PT0502与Yr10基因连锁.将该片段进行克隆、测序,根据其序列设计了PCR特异扩增用专化引物.经用195株F2代分离株进行遗传连锁性分析表明,用所设计的引物进行PCR,其主要产物SC200片段与抗条锈病基因Yr10的连锁距离为0.5cM,可用于该基因的快速、有效、准确检测.
AFLP analysis was carried out by using six Pst I primer and ten TaqI primer pairs against the stripe rust resistance gene Yr10 near-isogenic line and the recurrent parent Avocet S, for the reference of the donor parent Moro of stripe rust resistance gene Yr10. Out of about 4,200 discernible bands, of which 5 are stable bands of difference. The genetic linkage between five specific bands and the target gene was analyzed by F2 population segregated by crossing the donor parent Moro of Yr10 with the susceptible cultivar Mingxian 169 and found that the specific band PT0502 was linked with the Yr10 gene . The fragment was cloned and sequenced, and specific primers for PCR specific amplification were designed according to its sequence. The genetic linkage analysis of 195 F2 progenies showed that the linkage between the SC200 fragment of the major product SC200 and the stripe rust resistance gene Yr10 was 0.5cM, which could be used for the rapid and effective , Accurate detection.