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首页> 外文期刊>American Journal of Plant Sciences >Utilizing Dominant Early Maturity Genes of Sterile Line UP-3s in Hybrid Rice Breeding to Avoid High Temperature Season
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Utilizing Dominant Early Maturity Genes of Sterile Line UP-3s in Hybrid Rice Breeding to Avoid High Temperature Season

机译：利用杂交水稻育种不育系UP-3s的早期显性成熟基因避免高温季节

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A new sterile line UP-3s, which carries the Dominant Early Maturity Gene (DEMG), was bred on the farm of University of Arkansas at Pine Bluff (UAPB). UP-3s and two check sterile lines, Jin23-A and Xie-A which do not carry the Dominant Early Maturity Gene, were crossed with a group of different maturity restorer lines, PB-1R, PB-5R，PB11, PB-13R, PB-20, PB-21, PB-22R, and PB-23R. Eighteen new hybrid rice combinations of these crosses were then tested at UAPB in 2012 and 2013. The results showed that panicle differentiation (PD) of hybrids from female parent UP-3s (DEMG) crossed with the 8 male parents, were earlier than the hybrids from female parent Jin23-A or Xie-A crossed with the 8 male parents. The PD of these earlier hybrids was before Jun 25 and heading was before July 20. Early PD and heading avoided the high temperature (over 34°C) period which usually occurs after July 20 in Arkansas. The yields of these earlier maturity hybrids with female parent UP-3s were higher than those of the late maturity hybrids thatwereF1 progeny of sterile lines Jin23-A or Xie-A (these two female parent checks with non-DEMG). These results showed that the DEMG sterile line UP-3s can be adopted in making crosses with later maturity restorer lines to obtain earlier maturity hybrids to avoid the high temperature period in Arkansas.
机译：在阿肯色大学派恩布拉夫分校（UAPB）的农场上繁殖了一个新的不育系UP-3s，它带有显性早期成熟基因（DEMG）。 UP-3s和两个不携带显性早期成熟基因的检查无菌株Jin23-A和Xie-A与一组不同的成熟度恢复株PB-1R，PB-5R，PB11，PB-13R杂交，PB-20，PB-21，PB-22R和PB-23R。然后在2012年和2013年在UAPB上对这些杂交的18个新杂交稻组合进行了测试。结果表明，来自雌性亲本UP-3s（DEMG）的杂种与8个雄性亲本杂交的穗分化（PD）早于杂种来自女性父母Jin23-A或Xie-A的8位男性父母。这些早期杂种的PD于6月25日之前，抽穗期于7月20日之前。早期PD和抽穗避免了通常在7月20日之后在阿肯色州发生的高温（超过34°C）时期。这些具有雌性亲本UP-3的较早成熟杂种的产量高于具有不育系Jin23-A或Xie-A的F1后代的晚期成熟杂种（这两个具有非DEMG的雌性亲本检查）。这些结果表明，DEMG不育系UP-3s可以与较晚的恢复系杂交，以获得较早的杂交体，从而避免了阿肯色州的高温时期。

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