论文部分内容阅读
[目的]通过遗传效应分析,为三倍体西瓜种壳性状改良提供依据。[方法]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]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,相关系数为0.631;与番茄红素和干物质含量呈显性负相关,相关系数为0.288和0.386。败育种壳长与种壳宽成极显著加性正相关,相关系数为0.983。[结论]该研究为三倍体西瓜育种中的基因改良提供参考。
[Objective] The research aimed to provide the basis for the improvement of the seedling traits of triploid watermelon by genetic effect analysis. [Method] Six diploid inbred lines of four ecotypes of watermelon were used as male parents and six diploid inbred lines of the same ecological type as male parents. They were prepared according to NCII (North Carolina II) genetic mating design 6 × 6 F1 hybrids were used to analyze the genetic effects of seed-shell traits on watermelon using additive-dominance genetic model. [Result] The number of seed banks in the section was controlled by additive effect, dominant effect and environmental effect. The additive effects of length and breadth of aborted species were significant, and the variance of environment (machine error) reached significant or extremely significant level. There was a significant negative correlation between shell number and soluble solid content in the cross section, with a correlation coefficient of 0.631. The correlation coefficients were negatively correlated with lycopene and dry matter contents, with correlation coefficients of 0.288 and 0.386. The length of the aborted species was positively correlated with the width of the shell, with a significant correlation coefficient of 0.983. [Conclusion] This study provided a reference for genetic improvement in triploid watermelon breeding.