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Genetic and cytological analysis of a new spontaneous male sterility in radish (Raphanus sativus L.)

renchunxiao 添加于 2011/12/5 13:24:29  1305次阅读 | 0次推荐 | 0个评论

A male sterile plant appeared in the radish breeding program at the Hubei Academy of Agricultural Sciences, Hubei, China.In its progeny, a two-type (half of plants male sterile, the other half male fertile) line 01GAB was established. An F2 population of 260 plants from a cross of male-sterile 01GAB and a male fertile line 9802H segregated for male fertility ina 3:1 ratio indicating that fertility was restored by a single dominant gene, here designated RsMs. A PCR-based DNA marker specific to the male fertility Rfob gene in 9802H was absent in 01GAB. Linkage analysis placed the RsMs locus 10.7 cM away from the Rfo locus. In an F2 population of hybrids between 01GAB and male fertile 9802B, a co-dominant DNA marker for the RSultr3.2A (a radish sulfate transporter gene) locus was linked to the RsMs locus at 1.5 cM suggesting that fertility restoration in 01GAB was located in the region with known male sterility restorersin radish. However, no maintainer for the 01GAB source of male sterility has been identified so far. Cytological observationshave shown that the abnormalities in male sterile anthers first appeared in tapetum at the tetrad stage, followed by a hypertrophyof the tapetal cells at the vacuolate microspore period. These results suggest that male sterility in 01GAB is likely to begenetic in nature, or it may represent a new type of the cytoplasmic male sterility.

作 者:Zhi-Wei Wang, Lei Gao, Hai Zhou Liu, Shi Yong Mei, Yuan Zhou, Chang Ping Xiang and Ting Wang
期刊名称: Euphytica
期卷页: 第卷 第期 页
学科领域:生命科学 » 遗传学与生物信息学 » 植物遗传学
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原文链接:http://www.springerlink.com/content/3m4303925615n500/
DOI: 10.1007/s10681-011-0568-x
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