A new male sterile mutant LZ in wheat (Triticum aestivum L.)

文献类型： 外文期刊

第一作者： Zhou, Kuanji

作者： Zhou, Kuanji;Wang, Genxuan;Zhou, Kuanji;Wang, Shihong;Feng, Yuqin;Ji, Wanquan

作者机构：

关键词： wheat;genetic male sterility;genetic analysis;nullisomic analysis;allelism

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： 2008 年 159 卷 3 期

页码：

收录情况： SCI

摘要： Genetic male sterility (GMS) genes in wheat (Triticum aestivum L.) can be used for commercial hybrid seed production. A new wheat GMS mutant, LZ, was successfully used in the 4E-ms system for producing hybrid wheat, a new approach of producing hybrid seed based on GMS. Our objective was to analyse the genetic mechanism of male sterility and locate the GMS gene in mutant LZ to a chromosome. We firstly crossed male sterile line 257A (2n = 42) derived from mutant LZ to Chinese Spring and several other cultivars for determining the self-fertility of the F-1 hybrids and the segregation ratios of male-sterile and fertile plants in the F-2 and BC1 generations. Secondly, we conducted nullisomic analysis by crossing male sterile plants of line 257A to 21 self-fertile nullisomic lines as male to test the F-1 fertilities and to locate the GMS gene in mutant LZ to a chromosome. Thirdly, we conducted an allelism test with Cornerstone, which has ms1c located on chromosome 4BS. All F(1)s were male fertile and the segregation ratio of male-sterile: fertile plants in all BC1 and F-2 populations fitted 1:1 and 1:3 ratios, respectively. The male sterility was stably inherited, and was not affected by environmental factors in two different locations or by the cytoplasm of wheat cultivars in four reciprocal cross combinations. The results of nullisomic analysis indicated the gene was on chromosome 4B. The allelism test showed that the mutant LZ was allelic to ms1c. We concluded that the mutant LZ has common wheat cytoplasm and carries a stably inherited monogenic recessive gene named ms1g.

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