四倍体棉花抗螨性的双列杂交分析  

DIALLEL ANALYSIS OF SPIDER MITE RESISTANCE IN TETRAPLOID CULTIVATED COTTONS

作　　者：张金发[1] 吴征彬[1] 郭介华 刘金兰 孙济中 

机构地区：[1]华中农业大学作物遗传改良国家重点实验室

出　　处：《华中农业大学学报》1996年第1期10-14,共5页Journal of Huazhong Agricultural University

基　　金：农业部重大基础研究资助

摘　　要：用３个抗螨海岛棉与６个感螨陆地棉亲本配制３６个Ｆ＿１代组合，根据螨害级别进行了双列杂交分析。试验中抗螨性的一般配合力方差占主导地位，亲本的抗螨水平与配合力效应十分吻合，３个海岛棉螨害轻，它们的配合力效应负值较大，陆地棉中以当地品种鄂荆１号的配合力最小。３６个组合中抗×抗和感×抗表现抗，而感×感仍表现感，其中仅１２个组合（主要为陆地棉×海岛棉）具有显著的特殊配合力效应。在本试验中，抗螨性的遗传符合加性一显性模型，以加性变异为主，广义、狭义遗传力分别为０．８８和０．７４，估计出一组显性抗螨基因。Three Gossypium barbadense cultivars and 6 G. hirsutum cultivars were used to make 36 F1 crosses without reciprocals. Analysis of the half diallel crossing of both 9 parents and F1 crosses showed that general combining ability(GCA)variance predominated in spider mite(Tetranychus spp.)resistance,The resistant level of the parents was consistent with their GCA effects,Three G. barbadense cultivars had lower spider mite damage with stronger negative GCA effects. F1 crosses of resistnat × resistant and resistant × susceptible showed resistance to spider mites. Hayman and Jinks analysis indicated that the inheritance of spider mite resistance conformed to an additivedominance model with predominant additive variance. Broad and narrow heritability estimates for the spider mite resistnace were 0.88 and 0. 74 respectively. There was only one effective factor detected.

关 键 词：陆地棉 海岛棉 抗螨性 双列杂交 育种 棉花 

分 类 号：S562.034[农业科学—作物学]