三倍体西瓜种壳性状的基因效应分析

选用西瓜4个生态型的6个四倍体自交系作母本和同一生态型的6个二倍体自交系作父本,按NCII (north carolina II) 遗传交配设计方法配制6×6个杂种F1,采用加性-显性遗传模型分析西瓜种壳性状的遗传效应.结果表明,剖面种壳数受基因的加性效应、显性效应以及环境效应共同控制.败育种壳长和宽的加性效应显著,环境(机误)方差达到显著或极显著水平.剖面种壳数与边缘可溶性固形物含量呈加性显著负相关,与番茄红素和干物质含量呈显性负相关.败育种壳长与种壳宽成极显著加性正相关.

Analysis of genetic effects on seed coat characteritics in triploid watermelon

Genetic effects of seed coat characters and their related characteristics in triploid watermelon were analyzed by additive-dominant genetic model based on thirty-six F_1 hybrids which were crossed by six female parents of four ecotypes and six male parents of same ecotype according to North Carolina II crossing design.The results indicated that the seed coat number character was controlled by additive effects,dominant effects and error variance of genetic together.The additive effects of the length and width of abortive seed coat were significant,and the error variance was significant or highly significant.It is observed that there was a significant negative correlation of additive effects between the seed coat number and fringe soluble sugar.Also there was a significant negative correlation of dominant effects between lycopene,dry matter and the seed coat number.However,there was a highly significant positive correlation of additive effects between the length and width of abortive seed coat.