笋瓜节间长发育逆转及其遗传模型研究  

Analysis on Internodes Length Development Reversal and Genetic Model of Cucurbita maxima

作　　者：向成钢 王长林[1] 王学香[1] 陈花[1] 王迎杰[1] 

机构地区：[1]中国农业科学院蔬菜花卉研究所

出　　处：《植物遗传资源学报》2014年第1期106-112,共7页Journal of Plant Genetic Resources

基　　金：中国农业科学院基本科研业务费预算增量项目(2013ZL010);公益性行业(农业)科研专项(201303112);国家科技支撑计划(2012BAD02B03);中央级公益性科研院所基本科研业务费专项(2060302-2-12);农业部园艺作物生物学与种质创制重点实验室项目

摘　　要：分别以短蔓型和长蔓型笋瓜材料为亲本构建6世代群体，测量各群体不同节位节问长的变化，对节间长性状进行遗传规律分析。研究结果表明：节间长性状受核基因控制，F1群体的节间长性状在生长过程中存在发育逆转现象，逆转时期发生在6～15节位之间。遗传模型分析结果显示，在幼苗期和逆转期，笋瓜的节间长受到2对主效基因控制，符合E1模型，主基因方差能解释F：群体方差的70％以上；生长后期则受到主效单基因控制，符合D4模型，但主效基因效应不强，只能解释F2群体方差的10％，且环境因素对植株生长后期节间长具有明显影响。Genetic population derived from a line ＇Agol ＇（ dwarf ）and＇ Xuel ＇（vine）was used to analyze the inheritance of internode length in Cucurbita maxima. The result showed that dwarf and vine was determined by nuclear genes. Developmental reversal of dominance were found in this study. The genetic model showed that the internode length were controlled by two major gene （genetic model E1 ） in early development and reversal of dominance stage,and the major gene could explain more than 70% variation. But in the late development stage, it was controlled by a single gene （genetic model D4）,which explaining 10% variation. The results also proved that in late development stage environment it had significantly effect on internode length development. This study would provide more information for dwarf-type genetic mechanism also the results would lay a good foundation for Cucurbita maxima dwarf-type breeding.

关 键 词：笋瓜 节间长 发育逆转 

分 类 号：S642.1[农业科学—蔬菜学]