摘要
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 5 0 %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 ,决定各性状的基因估计数均在 6对以上 ;各性状的偏度和峰度系数的估算结果表明 ,控制颖花数、二次枝梗数和穗颈大维管束数、倒二节间小维管束数的多基因间无互作 ,而控制一次枝梗数和穗颈小维管束数、倒二节间大维管束数的多基因间有互补作用 ;穗颈大、小维管束数之比和倒二节间与穗颈大维管束数之比能较好地反映研究材料的亚种属性 ,在水稻籼。
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.
出处
《作物学报》
CAS
CSCD
北大核心
2002年第1期86-89,共4页
Acta Agronomica Sinica
基金
国家自然科学基金资助项目 (3 0 0 70 42 5 )
湖北省自然科学基金项目 (1999J0 85
2 0 0 0 J12 0 )
国家教育部高等学校骨干教师资助计划项目
关键词
水稻
双单倍体群体
穗颈维管束
遗传力
基因互作
穗部性状
Rice( Oryza sativa L.)
Doubled haploid population
Vascular bundles in neck panicle
heritability
Genic interaction
