甜瓜杂种优势与亲本遗传距离相关性分析

以9个来源于不同地区的甜瓜品种为母本,早熟优质甜瓜品种甜帅,日本小青玉为父本,配置18个杂交组合,对组合的形态及生理生化指标进行评价.结果表明:除了果肉厚度和硬度外,单瓜重、可溶性固形物、糖酸比以及Vc含量等各性状在0.05或0.01水平上差异显著;对F1的6项指标的离亲优势的分析发现在所有指标的杂种优势计算中,不是遗传距离远的亲本就能得到的较高数值的杂交一代;精品白糖罐与甜帅的杂交后代是具有多性状高优势的优良组合.

Relationship Between Genetic Distance and Heterosis on Melon

9 melons from different origin were selected as female parents and premature,high yield melon accession Tianshuai and Ribenxiaoqingyu as male parents,crossed 18 hybrids and estimated the morphological characters on hybrid progeny.The result showed: weight per melon,ratio of sugar and acid,soluble content and Vc content were notable variation on the level of 0.05 and 0.01 except for thickness of sarcocarp and hardness.After analysis of heterosis of all morphological characters,genetic distance and heterosis had not positive correlation,the progeny from Jingpinbaitangguan and Tianshuai which had relative genetic distance parents had the high heterosis on most morphological characters.