Analysis on Yield Components of Series CMS-FA Hybrid Rice Combinations Derived from Restorer Line Jinhui 3
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摘要: 为了解金恢3号配组杂交稻的增产潜力, 选用7个CMS-FA胞质不育系配制成的7个CMS-FA胞质杂交稻组合及对照汕优63为材料, 分析金恢3号配制系列杂交稻组合产量与产量构成因素间的关系及各构成因素在产量中的作用。结果表明, 金恢3号配制系列杂交稻组合产量水平平均达7 877.8kg·hm-2, 多数组合产量显著或极显著高于对照;产量与每穗粒数呈显著的正相关, 与有效穗数、结实率和千粒重之间相关不显著;每穗粒数对产量形成起正向直接作用最大, 而有效穗数和千粒重对产量起较大的负向直接作用;利用金恢3号测配组合时, 以选择具有一定有效穗数, 千粒重不宜过大的不育系为宜。Abstract: Relationship between yield and yield components of series CMS-FA hybrid rice combinations derived from restorer line Jinhui 3was studied.It aimed at detecting the yield potential of CMS-FA hybrid rice combinations crossbred with restorer line Jinhui 3.Using 7CMS-FA sterile lines as female parents and corresponding restorers Jinhui 3as male parents, 7crosses were made, along with Shanyou 63as the control, were used for the study.The results showed that series CMS-FA hybrid rice yield an average of 7 877.8kg·hm-2, the majority of combination of yield was significantly or very significantly higher than the control.The yield was significantly positively correlated with total grain number per plant (TGNPP) , and not significantly correlated with effective panicles per plant (PP) , seed-set percent (SSP) and 1000-grain-weight (TGW) .Yield was positively directly affected by TGNPP, and was negatively directly affected by PP and TGW.When using restorer line Jinhui 3to cross CMS-FA hybrid rice combinations, CMS-FA sterile line should be selected within a certain PP, TGW should not be too large as appropriate.
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Key words:
- rice /
- CMS-FA /
- restorer line /
- Jinhui 3 /
- yield component
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