水稻穗颈维管束和穗部性状的遗传分析

采用籼、粳亚种间杂种F1花药培养获得的DH群体对水稻穗颈和倒2节间维管束等性状进行了数量遗传分析. 结果表明, 颖花数、一次枝梗数、二次枝梗数和穗颈大、小维管束数的遗传力在70%以上, 倒二节间大、小维管束数的遗传力则在50%以上; 颖花数、一次枝梗数、二次枝梗数和穗颈、倒二节间大小维管束数这类性状均受多基因控制, 决

Genetic Analysis of Neck-panicle Vascular Bundle and Panicle Characteristics in Rice (Oryza sativa L.)

Quantitative genetic analyses of vascular bundles in neck panicle and second internode were carried out by using a rice doubled haploid population derived from anther culture of intersubspecific hybrid F 1. It was shown that the heritabilities of spikelets per panicle, primary branch number, secondary branch number and numbers of large, small vascular bundles in neck panicle were above 70%, while numbers of large and small vascular bundles in second internode, above 50%. The numbers of genetic factors involved in above mentioned traits were more than 6.0. According to estimated coefficients of skewness (g 1) and kortosis (g 2) of the traits, complementary interactions were detected for the traits, i.g., primary branch number, number of small vascular bundles in neck panicle and number of large vascular bundles in second internode. Genic interactions were not found for spikelets per panicle, secondary branch number, number of large vascular bundles in neck panicle and numbers of small vascular bundles in second internode. Ratio of numbers of large to small vascular bundles in neck panicle and ratio of number of large vascular bundles in second internode to that in neck panicle can show better the subspecific characteristics of material studied and may be used in classification of indica and japonica subspecies for reference.