籼型杂交水稻新不育系和新恢复系的品质配合力分析
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广东省科技计划项目 (2011A020102008,2013B090200027);广东省产学研重大成果转化项目(2013B090200027); 农业部公益性行业(农业)科研专项 (201403030);罗定市扬帆计划竞争性扶持市县重点人才工程项目“优质高产杂交稻及配套高产栽培技术示范推广”


Analysis on combining ability of quality traits of new male sterile lines and new restorer lines of indica hybrid rice
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    【目的】研究籼型杂交水稻新不育系和新恢复系的品质配合力。【方法】采用不完全双列杂交设计(NCII),以自育的4个新不育系和4个新恢复系配组,组合分别于2014年早、晚季种植,考察4×4个组合的品质性状,进行配合力分析。【结果】大多数品质性状一般配合力和特殊配合力的方差均达显著或极显著水平,且一般配合力方差大于特殊配合力方差。在整精米率、垩白粒率、垩白度和直链淀粉含量等性状上不育系的一般配合力方差贡献率比恢复系高。不育系中,G软华A在大多数品质性状上表现优良,具有较好的一般配合力和较大的特殊配合力效应方差,在其余品质性状上也无明显缺陷,是一个品质优良的亲本。恢复系中,没有一个恢复系能在所有的品质性状中都表现优良,或多或少都有缺陷。其中化感稻3号在出糙率、精米率、整精米率、垩白度和粒长宽比上表现较好。华恢521在垩白粒率、直链淀粉含量和胶稠度上一般配合力好且特殊配合力效应方差较大,易配出低垩白粒率、理想的直链淀粉含量和胶稠度组合。【结论】各品质性状受加性效应和非加性效应共同控制,大多数以加性效应为主。在整精米率、垩白粒率、垩白度和直链淀粉含量等性状上不育系的加性效应贡献率比恢复系高,在粒长宽比和胶稠度性状上则恢复系的加性效应贡献率更高。

    Abstract:

    【Objective】To study combining ability of quality traits of new male sterile lines and new restorer lines of indica hybrid rice. 【Method】 An incomplete diallel design (NCII) was adopted. Four self-bred new male sterile lines and four new restorer lines were combined, and the combinations were planted in the early and late seasons in 2014. The quality traits of these 4×4 combinations were surveyed to analyze their combining ability. 【Result】Both general combining ability variance and specific combining ability variance were significant at 5% or 1% levels for most traits, the former was larger than the later. The contribution rates of general combining ability variances of male sterile lines were much greater than those of restorer lines regarding head rice rate, chalky rice rate, chalkiness degree, amylose content, etc. Among the male sterile lines, G Ruanhua A was excellent in most quality characters, featuring good general combining ability and great variance of specific combining ability, and had no obvious defects in other characters, so it was an excellent parent. On the other hand, character defects were found in all restorer lines. Nevertheless,Huagandao 3 had many desired traits including brown rice rate, milled rice rate, head rice rate, chalkiness degree and length/width ratio. Huahui 521 had good general combining ability and great variance of specific combining ability in terms of chalky rice rate, amylose content and gel consistency, which made it easier to obtain combinations of suitable amylose content, gel consistency and low chalky rice rate. 【Conclusion】The quality traits are controlled by both additive and non-additive effects, and the additive effect is more important. The contribution rates of additive effects of male sterile lines are much greater than those of restorer lines regarding head rice rate, chalky rice rate, chalkiness degree, amylose content, etc. However, for length/width ratio and gel consistency, the additive effects of restorer lines are greater.

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刘昌乾,彭海峰,邱振国,何玉琼,李文安,唐培洵,李少泽,陈雄辉.籼型杂交水稻新不育系和新恢复系的品质配合力分析[J].华南农业大学学报,2016,37(2):30-35

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  • 收稿日期:2015-06-16
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  • 在线发布日期: 2016-02-02