SSR markers associated with fertility restoration genes against Triticum timopheevii cytoplasm in Diticum aestivum

文献类型： 外文期刊

第一作者： Zhou, WC

作者： Zhou, WC;Kolb, FL;Domier, LL;Wang, SW

作者机构：

关键词： fertility restoration gene;hybrid wheat;marker-assisted selection;molecular mapping;Rf3;SSR markers

期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）

ISSN： 0014-2336

年卷期： 2005 年 141 卷 1-2 期

页码：

收录情况： SCI

摘要： Heterosis is an important way to improve yield and quality for many crops. Hybrid rice and hybrid maize contributed to enhanced productivity which is essential to supply enough food for the increasing world population. The success of hybrid rice in China has led to a continuous interest in hybrid wheat, even when most research on hybrid wheat has been discontinued in other countries for various reasons including low heterosis and high seed production costs. The Timopheevii cytoplasmic male sterile system is ideal for producing hybrid wheat seeds when fertility restoration lines with strong fertility restoration ability are available. To develop PCR-based molecular markers for use in marker-assisted selection of fertility restorer lines, two F-2 populations derived from crosses R18/ND36 and R9034/ND36 were used to map fertility restoration genes in the two elite fertility restorer lines (R-lines) R 18 and R9034. Over 678 SSR markers were analyzed, and markers closely linked to fertility restoration genes were identified. Using SSR markers, a major fertility restoration gene, Rf3, was located on the 1B chromosome in both populations. This gene was partially dominant in conferring fertility restoration in the two restorer lines. SSR markers Xbarc207,Xgwm131, and Xbarc61 are close to this gene. These markers maybe useful in marker-assisted selection of new restorer lines with T timopheevii cytoplasm. Two minor QTL conferring fertility restoration were also identified on chromosomes 5A (in R 18) and 7D (in R9034) in two R-lines.

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