水稻抗性淀粉含量性状的配合力分析

抗性淀粉对人体具有多种重要的生理功能,为了获得具有高抗性淀粉含量的水稻杂交后代,选用6个抗性淀粉含量具有显著差异的水稻品种按Griffing双列杂交设计配置成杂交组合,及正反交F1为材料研究了水稻籽粒抗性淀粉含量性状的遗传规律。结果表明,水稻抗性淀粉含量在参试组合中加性效应起主要的作用,同时受非加性效应以及细胞质效应的影响。GCA效应在各亲本间存在明显差异,‘降糖稻1号’和‘丙9331’亲本均表现很高的正向GCA效应值,其一般配合力效应值分别为0.303和0.101。其他品种均表现负向GCA效应值。亲本本身的抗性淀粉含量与一般配合力的表现趋势一致,与相应的SCA有明显的相关性,与杂种一代表现有显著的相关性,表明利用亲本表型值对于预测组合的杂种优势具有一定的意义。

Analysis on Combining Ability of Resistant Starch Content in Rice Grain

Resistant starch has a variety of important physiological functions on human body. The inheritance of the grain resistant starch content was investigated by a 62 diallel design and 6 combinations＇ reciprocal cross in order to obtain the rice hybrids with high resistant starch content. The results showed that： resistant starch content was influenced by additive, non-additive effects and the cytoplasm effect, and mainly by additive effects. The general combining ability （GCA） effect was varied between varieties. ＇Jiangtangdaol＇ and ＇Bing9331＇ showed high positive general combining ability effects, and the general combining ability effect values were 0.303 and 0.101 respectively. The others showed negative general combining ability effects. The expression of parental resistant starch content was obviously correlated with specific combining ability effects, but was significantly correlated with the general combining ability effects and the exoression of F, hybrid.indicated that the parental value could be used to forecast the heterosis in hybrid rice.