菊花花期性状的杂种优势与混合遗传分析  

Heterosis and mixed genetic analysis for florescence-related traits of chrysanthemum

作　　者：张飞[1,2] 陈发棣[1] 房伟民[1] 陈素梅[1] 刘浦生[1] 尹冬梅[1] 

机构地区：[1]南京农业大学园艺学院,江苏南京210095 [2]浙江省农业科学院花卉研究开发中心,浙江杭州311202

出　　处：《南京农业大学学报》2011年第4期31-36,共6页Journal of Nanjing Agricultural University

基　　金：国家自然科学基金项目(30871724);农业部948滚动项目(2008-G3);国家公益性行业(农业)科研专项(200903020)

摘　　要：以秋菊品种‘雨花落英’为母本和夏菊品种‘奥运含笑’为父本配制F1杂种,调查F1世代4个花期相关性状在2008至2009两个年度的表型资料,运用单个分离世代的主基因+多基因混合遗传模型,对4个花期相关性状进行遗传分析。结果表明:4个花期性状均存在一定的杂种优势,现蕾期、显色期、盛花期和衰败期4个花期性状的中亲优势值均达极显著水平,中亲优势率分别为22.23%、17.60%、12.45%和11.11%,且超亲分离现象普遍存在。混合遗传分析表明菊花盛花期符合B-6模型,由表现为加性-显性的2对主基因控制;现蕾期、显色期和衰败期符合B-1模型,由表现为加性-显性-上位性的2对主基因控制。控制现蕾期、显色期、盛花期和衰败期的主基因遗传率分别为89.92%、49.30%、28.56%和75.46%。In this study,the inheritance of four florescence-related traits of chrysanthemum,budding date,color developing date,full flowering date and downfalling date,was investigated using segregation within an F1 population derived from a cross between the autumn-flowering＇Yuhualuoying＇and the summer-flowering＇Aoyunhanxiao＇cultivars based on the major gene plus polygene mixed inheritance model.The result indicated that the four florescence-related traits herein segregated widely in F1 population with coefficient of variation（CV）ranging from 7.59% to 25.07%.The phenomenon of hybridization heterosis and extra-parent segregation existed generally in the F1 population.Compared with mid-parent value（MPV）,the heterosis value of mid-parent（Hm）of four florescence-related traits investigated showed a significant difference at 0.01 level with a rate of heterosis（RHm）of 22.23%,17.60%,12.45% and 11.11%,respectively.The mixed genetic analysis suggested that the inheritance of full flowering date was compatible with the presence of two pairs of major genes displaying additivity-dominance（B-6 model）,whereas that of the other three flowering traits was compatible with the presence of two pairs of major genes displaying additivity-dominance-epistasis（B-1 model）and with additivity predominating.The heritability of major genes for the four flowering traits of budding date,color developing date,full flowering date and downfalling date initial blooming time were 89.92%,49.30%,28.56% and 75.46%,respectively.

关 键 词：菊花 花期性状 杂种优势 主基因+多基因混合遗传模型 

分 类 号：S682.1[农业科学—观赏园艺]