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Detection of Allelic Variation in Chinese Wheat (Triticum aestivum L.) germplasm with drought ToleranceUsing SSR Markers

引用

Agricultural Sciences in China 2002年第10期1卷 1083-1088页

作者： JING Rui-lian, CHANG Xiao-ping, Marcello Broggio and JIA Ji-zeng(Key Laboratory of Crop germplasm and Biotechnology , Institute of Crop germplasm Resources , Chinese Academy of Agricultural Sciences, Beijing 100081 , P. R. China Oversea Agronomic Institute, Florence 50131 , Italy) Key Laboratory of Crop germplasm and Biotechnology Institute of Crop Germplasm Resources Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China Oversea Agronomic Institute Florence 50131Italy

Allelic variation in two domestic wheat landraces, Pingyaobaimai and Mazhamai, two cornerstone breeding materials and their derived cultivars with drought tolerance was detected by SSR (simple sequence repeat) markers. The clustering of 25 accessions showed that the similarity between Pingyaobaimai and Yandal817, the latter was developed from the former, was 0.71, the highest one of all accessions, but the similarities were very low between these two accessions and other accessions including their derived cultivars. A similar situation was revealed between Mazhamai and its derived cultivars. Pingyaobaimai and its three derived cultivars shared three alleles at loci Xgwm526, Xgwm538 and Xgwm126 on chromosome arms 2BL, 4BL and 5AL, respectively. There were six shared alleles in Mazhamai and its derived cultivars, in order of Xgwm157, Xgwm126, Xgwm212, Xgwm626, Xgwm471 and Xgwm44 on chromosome arms 2DL, 5AL, 5DL, 6BL, 7AS and 7DC, respectively. Only one shared allele was detected between the pedigrees of Pingyaobaimai and Mazhamai. The difference of shared alleles in two cornerstone breeding materials and their derived cultivars revealed the diversity in Chinese wheat germplasm with drought tolerance and the complication in genetic basis of drought tolerance in wheat.

关键词： Wheat (Triticum aestivum L.) Allelic variation drought tolerant germplasm SSR marker

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