摘要
本文用6个亲本,按(1/2)n(n-1)双列杂交法配制15个杂交组合,用Hayman双列杂交分析法对辣椒TMV、CMV、疫病和疮痂病抗性进行遗传参数估算。结果表明,TMV、CMV和疮痂病抗性遗传符合“加性-显性”模型,疫病抗性遗传不符合“加性-显性”模型,还存在显著上位性效应。F1代杂种抗性CMV是纯合的显性基因决定的,疮痂病是杂合的显性基因决定的;疫病抗性F1代杂种显性效应之和和控制性状表现显性的基因组数很少,几乎接近零。
Fifteen capsicum combinations were made with 6 parents by (1/2) n (n-1) diallel crossing. Genetic parameters in the resistance to TMV, CMV, phytophthora blight, bacterial spot of these combinations were studied by Hayman. The results indicated that the resistances to TMV, CMV and bacterial spot conformed genetically to the “additive-dominant” model but the resistance to phytophthora blight did not and significant epistatic dominance effect existed in it. F1 hybrid’s resistance to CMV was controlled by homozygous dominant gene(s), but resistance to bacterial spot by heterozygous one(s). There were little, or no sum of dominant effect and genomes controlling the dominant expression of F1 hybrids in its phytophthora blight resistance.
出处
《中国农业科学》
CAS
CSCD
北大核心
2004年第11期1636-1640,共5页
Scientia Agricultura Sinica
基金
国家863计划资助项目(2001AA241121-10)
