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Development of thermo-photo sensitive genic male sterile lines in wheat using doubled haploid breeding

文献类型： 外文期刊

作者： Li, Hongsheng 1 ; Li, Shaoxiang 1 ; Abdelkhalik, Sedhom 1 ; Shahzad, Armaghan 1 ; Gu, Jian 1 ; Yang, Zhonghui 1 ; Ding 1 ;

作者机构： 1.Yunnan Acad Agr Sci, Inst Food Crops, Yunnan Branch, Natl Wheat Improvement Ctr, Kunming 650205, Yunnan, Peoples R China

2.Agr Res Ctr, Filed Crops Res Inst, Kafr El Shaikh 33717, Egypt

3.Natl Agr Res Ctr, Natl Inst Genom & Adv Biotechnol, Islamabad 45500, Pakistan

关键词： Hybrid wheat; Two lines system; Thermo-photo sensitive genic male sterility; Doubled haploid; Wheat x maize

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.215； 五年影响因子：4.96 ）

ISSN： 1471-2229

年卷期： 2020 年 20 卷 1 期

页码：

收录情况： SCI

摘要： Background Two-line hybrid wheat system using thermo-photo sensitive genic male sterility (TPSGMS) is currently the most promising approach for wheat heterosis utilization in China. However, during past 20 years only few TPSGMS lines were developed in hybrid wheat breeding, which has been the main limiting factor to create heterotic hybrids. Application of doubled haploid (DH) breeding provides a useful strategy to efficiently develop practically usable TPSGMS lines. Results F(1)s and selected F-2 and F-3 sterile plants of eight crosses made from two commercial TPSGMS lines were used to produce DH lines. We developed a total of 24 elite DH sterile lines with stable sterility, good outcrossing and yield potential, resistance to yellow rust and powdery mildew, as well as desirable plant height (50-60 cm). These DH lines were developed within 4 years through at least 1 year of evaluation. The stability of male sterility was confirmed for most (20/24) of these elite DH sterile lines by multiple tests in two or 3 years. These lines are expected to be used in hybrid wheat breeding. The percentage of elite lines developed from the tested DH lines produced from filial generations was in the order of F-2 > F-3 > F-1. Conclusions We demonstrate that coupling DH techniques with conventional breeding is an efficient strategy for accelerating the development of more practical wheat TPSGMS lines. Generation of DHs from F-2 generation appeared to be the better choice considering the balance of shortening breeding time and overall breeding efficiency.

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