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十优838是广西农科院水稻研究所用优质不育系十优A与恢复系辐恢838配组育成的三系杂交稻新组合。本文介绍了杂交稻新组合十优838的特征特性及高产栽培技术。 相似文献
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高异交率籼型三系不育系M98A的选育与利用 总被引：3，自引：3，他引：3
以保持龙特浦A的综合优良性状,改造其不育性稳定性和稻米品质为定向选育目标,用龙特浦B作母本,Ⅱ-32B作父本杂交,在F4代的优良株系中选株与龙特浦A测交并回交,经多代回交转育,育成高异交率籼型三系不育系M98A.M98A表现不育性稳定,异交结实率高,抗病性好,配合力强,2005年1月通过安徽省农作物品种审定委员会审定.用该不育系配组育成的杂交中籼组合,表现早熟、高产、抗病,其中明优98和农华优808已分别通过国家和安徽省品种审定. 相似文献
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To improve grain quality of the high-yielding hybrid rice in China, we introduced the aromatic rice MR365, an improved Indian cultivar with aroma and other desirable grain quality characters such as long grain and low chalkiness, from IRRI in 1984 and began to transfer its aroma and good quality characters into the existing maintainer lines with good combining ability but poor grain quality. In the meantime, we also conducted the research on the inheritance of aroma for increasing the breeding efficiency. Through years of research and breeding practices, two cytoplasmic male sterile (CMS) lines Xiangxiang 2 A and Xinxiang A and a series of quasi-aromatic hybrids mated from these aromatic CMS lines have been developed and released for commercial production in China. It was found that the inheritance of aroma in MR 365 and its derivatives including Xiangxiang 2 A, Xinxiang A and Xiang 2B S was controlled by one pair of recessive major genes based on the identification of aroma by the KOH-soaking method. We also found that there existed disparity in aroma degree among different grains of F2 generation, and different aromatic CMS lines derived from the same aromatic donor such as Xiangxiang 2 A and Xinxiang A had also a little difference in the degree of aroma, which implies that, besides the major genes, aroma may also be affected by the genetic backgrounds or minor genes. Xiangxiang 2 A, developed from the cross of V20A∥V20B/MR365, is the first aromatic CMS line bred in China. It is not only aromatic but has good grain quality and combining ability. Using it as female parent, Xiangyou 63 (Xiangxiang 2A/Minghui 63), the first quasi-aromatic hybrid rice combination in China, was developed and approved to release to farmers in 1995. Xiangyou 63 is characteristic of quasi-aromatic or partially aromatic (because only a portion of or NOT ALL grains are aromatic), good grain quality, high-yielding ability, good blast resistance and wide adaptability. However, Xiangxiang 2 A has an evident drawback, i.e., instablility in male sterility under higher temperature conditions resulting from the existence of restoring minor genes in it, which greatly hampered the extension of its elite hybrid Xiangyou 63 with both high yield and fine quality in commercial production. To improve Xiangxiang 2 A, we made hybridization of Xiangxiang 2 B with V20 B again in 1990. A new aromatic CMS line Xinxiang A was successfully developed in 1994. It not only retains the favorable characteristics of Xiangxiang 2 A in grain quality and combining ability, but also expresses complete and stable male sterility and high seed production yield potential. Up to now, by using it as female parent, a series of quasi-aromatic hybrids have been developed. Some of them such as Xinxiangyou 63 (Xinxiang A/Minghui 63), Xinxiangyou 77 (Xinxiang A/Minghui 77), Xinxiangyou 80 (Xinxiang A/R80), Xinxiangyou 207 (Xinxiang A/R207) and Xinxiangyou 96 (Xinxiang A/R96) have been released to farmers. Such hybrids have been preferred and well welcome by the farmers in China, because they can not only yield higher or as high as but also possess a better grain quality than the current common high-yielding hybrid rice varieties, especially, they are naturally-mixed aromatic rice so that it can be consumed daily just like non-aromatic common rice. The planting area under these hybrids is increasing rapidly in China. It is expected that the quasi-aromatic hybrid rice will have a good prospect in the coming years. 相似文献
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优质籼型不育系金科1A的选育与利用 总被引：1，自引：1，他引：0
金科1A是以冈46B金/23B的F3代选系与金23A测交并连续回交转育而成的野败型籼型三系不育系。金科1A花粉败育彻底,不育性稳定,柱头外露率高(90%),异交结实率高,易于繁殖制种,株型紧凑,叶片窄直上挺,可恢复性好,米质优,于2005年9月通过湖北省技术鉴定。所配组合科优8377(金科1A/R8377),产量高,米质优,2006年9月通过国家农作物品种审定委员会审定。 相似文献
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籼型优质香稻不育系绵香1A的选育与应用 总被引：1，自引：1，他引：0
绵香1A是四川绵阳市农业科学研究所以印水型不育系优1A为母本、菲改B香/改B的F2代优良单株为父本测交,并经多代择优回交转育而成的籼型香稻不育系。该不育系育性稳定,农艺性状优良,米质优,所配组合产量高。绵香1A于2004年8月通过四川省技术鉴定,配制的组合绵香576（绵香1A辐/恢576）于2006年通过四川省农作物品种审定委员会审定,国豪国香8号（绵香1A/绵恢725）于2008年通过安徽省农作物品种审定委员会审定。 相似文献
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