一种提高作物产量杂种优势的亲本选配方法——以棉花为例

目的]研究棉花双亲间一些产量性状的差异与杂种一代产量中亲优势的变异性。方法]采用半双列杂交方法配制36个组合,按照随机区组方法进行设计。结果]双亲铃重均匀度和单株成铃数是棉花产量杂种优势变化的敏感性状,提高全株铃重均匀度的双亲差异或减小单株成铃数的双亲差异,均可使产量中亲优势变异加大。结论]该研究为选育产量强优或超强优杂种一代提供理论依据。

A Parent Selection Method to Improve Crop Yield Heterosis-Taking Cotton for Example

Objective] To study difference of some yield characters of cotton between parents and yield mid-parent heterosis variability of first generation of hybrid. Method] By adopting the method of half diallel cross 36 combination were prepared, and the experiment was carried out in accordance with the method of randomized block design. Result] Boll weight evenness of parents and the bell number per plant was the sensitive characters of cotton yield heterosis change.Improving parents differences of the whole boll weight evenness or reducing parents differences of the bell number per plant could make yield mid-parent heterosis variation increase. Conclusion] The study provides theoretical basis for breeding first generation of hybrid with strong optimal or super optimal yield.