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首页> 外文期刊>High Technology Letters >Breeding double low super hybrids with dominant genie male sterility three lines in Brassica napus
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Breeding double low super hybrids with dominant genie male sterility three lines in Brassica napus

机译：在甘蓝型油菜中选育具有优势的不育雄性三系的双低超级杂种

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摘要

A double low homozygous two-type sterile line ZY-2AB, its near-isogenic temporary maintainer line ZY-4, and the full sterile line ZY-3 derived from the cross of ZY-2A with ZY-4, were developed to breed three-line dominant GMS hybrid in Brassica napus. Three years data showed that the ratios of sterile and fertile plants fit the expected 1:1 ratio in ZY-2AB, and the 1:0 ratio in ZY-3, respectively. Some double low super hybrid combinations were screened out when the full sterile line ZY-3 was used as female parent, among which the combination 01Z24 increased 36. 88 percent more yield than control and the combination 98Z131 has been passed through the Sichuan Provincial Regional Test and registered in Sichuan Province. Two years data showed that the agronomic performance of the two-line hybrids derived from crosses of ZY-2A with restorer lines versus that of the three-line hybrids produced by ZY-3 was not different for any of the nine most important agronomic characteristics, revealing that near-isogenic line of homozygous two-type line was used as temporary maintainer could effectively avoid the disadvantage of three-way cross hybrid in breeding three-line dominant GMS hybrid.
机译：开发了双低纯合型两型不育系ZY-2AB，其近等基因的临时维持系ZY-4和源自ZY-2A与ZY-4杂交的全不育系ZY-3，以繁殖三个甘蓝型油菜的主要优势种GMS杂种。三年的数据表明，不育植物和可育植物的比例分别符合ZY-2AB中预期的1：1比例和ZY-3中的1：0比例。当以全不育系ZY-3为母本时，筛选出一些双低超级杂交组合，其中组合01Z24比对照增产36％。98Z131通过四川省区域试验，增产88％。并在四川省注册。两年的数据表明，从ZY-2A与还原系杂交的两系杂种的农艺性能与ZY-3产生的三系杂种的农艺性能在9个最重要的农艺特性中均无差异，揭示了将纯合两型近等基因系用作临时保持物可以有效地避免三向杂交的繁育。

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