‘北京截头’×西双版纳黄瓜重组自交系群体重要农艺性状的遗传分析  

Genetic analysis of the important agronomic traits on ‘Beijingjietou’× Xishuangbanna cucumber recombinant inbred lines

作　　者：薄凯亮[1] 沈佳[1] 钱春桃[1] 宋慧[1] 陈劲枫[1] 

机构地区：[1]南京农业大学作物遗传与种质创新国家重点实验室/园艺学院,江苏南京210095

出　　处：《南京农业大学学报》2011年第3期20-24,共5页Journal of Nanjing Agricultural University

基　　金：国家自然科学基金项目(30972007);江苏省科技基础设施建设计划项目(BM2008008)

摘　　要：利用‘北京截头’黄瓜×西双版纳黄瓜产生的永久性重组自交系(RIL)群体124个株系,对其苗期株高、第一雌花节位、第一分枝节位、初级分枝数、瓜长、瓜把长、瓜横径、瓜肉厚、瓜腔直径和单瓜重等10个重要农艺性状进行方差分析、相关分析和多元逐步回归分析以及通径分析。结果表明:这些性状在重组自交系群体中均存在双向超亲分离,分布频率大致接近正态分布。10个农艺性状在双亲之间均存在显著或极显著差异。瓜长和瓜横径均与单瓜重具有极显著相关关系,并解释了单瓜重89.0%的表型变异。瓜横径和瓜肉厚对单瓜重的通径分析与相关分析结果之间存在较大差异,表明通径分析更有利于解释性状之间的内在关系。Some important agronomic traits including seedling stage plant height,the first female flower node position,the first branch node,primary branch number,fruit length,fruit neck length,fruit diameter,flesh thickness,fruit cavity diameter and single fruit weight were investigated by using a set of 124 RIL population derived from an elite hybrid cross of ‘Beijingjietou’×Xishuangbanna cucumber in variance analysis,correlation analysis,stepwise regression analysis and path analysis.The results showed that the tremendous transgressive segregation for all traits was observed in the population and the frequency of these traits was approximately normally distributed.All traits between parents showed significant differences.The correlations between fruit length,fruit diameter and single fruit weight were significant,and these fourtraits contributed 89.0% of genetic variation of the single fruit weight.The path coefficient and correlation coefficient between panicle fruit,flesh thickness and single fruit weight were different,which showed that the path coefficient was more beneficial to explanation of their relation.

关 键 词：黄瓜 重组自交系 农艺性状 相关分析 回归分析 通径分析 

分 类 号：Q945.78[生物学—植物学]