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作者	单位
王宪国，张钰玉，白升升，王晓龙，刘芳军，张晓科，陈东升，朱建楚	（1.西北农林科技大学农学院/国家小麦改良中心杨凌分中心，陕西杨凌 712100；2.宁夏农林科学院农作物研究所，宁夏永宁 750105）

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中文摘要:

选育低黄色素含量品种是宁夏小麦品质改良的重要目标之一。为阐明宁夏小麦中控制籽粒黄色素含量基因 TaZds-A1和 TaZds-D1的组成及分布特点，利用其功能标记 YP2A-1和 YP2D-1对91份小麦品种进行检测与分析。结果表明，在 TaZds-A1位点，等位变异 TaZds-A1a（与低黄色素含量相关）和 TaZds-A1b（与高黄色素含量相关）分别占59.3%和40.7%；在 TaZds-D1位点，等位变异 TaZds-D1a（与高黄色素含量相关）占95.6%， TaZds-D1b（与低黄色素含量相关）仅占4.4%。宁夏小麦黄色素含量基因位点存在4种等位变异组合类型：以 TaZds-A1a/ TaZds-D1a（57.1%）组合类型为主， TaZds-A1b/ TaZds-D1a（38.5%）组合类型次之， TaZds-A1a/ TaZds-D1b和 TaZds-A1b/ TaZds-D1b组合类型最低（2.2%）；不同等位变异组合类型在不同地区间的分布比例也不同。

英文摘要:

Selecting wheat cultivars with lower yellow pigment content is one of the main goals on wheat quality improvement in Ningxia. In order to investigate the distribution of allelic variations for genes TaZds-A1 and TaZds-D1 controlling wheat yellow pigment content in Ningxia wheat cultivars, functional molecular markers YP2A-1 and YP2D-1 were used to detect 91 wheat cultivars from Ningxia. The results showed that two allelic variations at TaZds-A1 locus were found in Ningxia wheat cultivars. TaZds-A1a (with lower yellow pigment content) and TaZds-A1b (with higher yellow pigment content) alleles acounted a proportion of 59.3% and 40.7%, respectively. At TaZds-D1 locus, there were two alleles, TaZds-D1a (with higher yellow pigment content) and TaZds-D1b (with lower yellow pigment content). The genotype TaZds-D1a was the major type in Ningxia wheat cultivars, accounted for 95.6%, while TaZds-D1b accounted for only 4.4%. Four allelic combinations at the two loci with different frequencies were found in Ningxia wheat cultivars. The frequencies of allelic combination TaZds-A1a/ TaZds-D1a, TaZds-A1b/ TaZds-D1a, TaZds-A1a/ TaZds-D1b and TaZds-A1b/ TaZds-D1b were 57.1%, 38.5%, 2.2% and 2.2%, respectively. The frequencies of allelic combinations at the two loci were largely influenced by the regions of the cultivars.

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