摘要： 对甜瓜F2群体的性状遗传进行分析,利用J28-1-4-2(H)-2-2-1和DC-4-1-7-2-1-4-1-1-1杂交得到203个F2个体,2007年对节间长、叶长、叶宽等9个性状进行调查、评价。对所得数据进行方差分析、相关分析、全子集法回归分析、通径分析。结果表明,除了节间长性状外,其他性状都呈正态分布,说明这些性状是数量性状。节间长性状呈双峰分布,与前人的研究结果存在着不同。所有测量的性状都与产量有极显著的相关。通径分析表明,节间长度对于果重的直接影响比较小,节间与产量的相关系数较大,主要是由其他性状间接造成的,所以说明节间性状不会影响产量。为甜瓜短节间育种提供了理论依据。

关键词: 甜瓜, 农艺性状, 方差分析, 相关分析, 通径分析

Abstract: We have analyzed internode length,leaf width,leaf length,and other six traits in an F2 population of a cross between J28 -1 -4 -2(H)-2 -2 -1 and DC -4 -1 -7 -2 -1 -4 -1 -1 -1 using variance analysis,correlation analysis and path analysis.The results show that all traits,expect internode length which gives a bimodal distribution,give approximately normal distributions in the F2 population,indicating that they are controled by QTLs.The bimodal distribution of internode length ,which is different from previously reports,suggests that it is controlled by more than one gene.The correlation among all traits investigated are highly significant.Path analysis indicates that internode length has a minor effect on fruit weight.The significant correlation coeffcient between internode length and fruit weight may caused by other traits ,which suggest the internode length may not affect the fruit weight.It will provide the theory for melon short internode breeding.

Key words: Melon, Agronomictrait, Varianceanalysis, Correlationcoefficient, Pathanalysis

中图分类号: 

• S652.03