SSR标记遗传距离与辣椒杂种优势的关系（英文）

目的]探索应用SSR标记遗传距离预测辣椒杂种优势的可行性,实现辣椒杂种优势早期预测。方法]以10个辣椒自育亲本为试验材料,按NCⅡ不完全双列杂交组配25个杂交组合,利用SSR标记分析遗传距离与杂种优势的关系。结果]供试亲本之间的遗传距离在0.13~0.33内变化,平均遗传距离为0.25,表明了供试亲本之间遗传差异不明显,亲缘关系较近。SSR分子标遗传距离与单株挂果数、单株产量存在一定的相关性,与其他各性状无相关性差异。结论]SSR分子标记分析表明,辣椒亲本间遗传距离越大,其组配的杂交组合获强优势组合的产量越高;亲本间遗传距离越小,其组配的杂交组合获强优势组合的产量越低。

Relationship between SSR Genetic Distance and Heterosis in Hot Pepper

Objective] This study aimed to predict the heterosis of hot pepper using SSR genetice distance. Method] Twenty-five hybridized combinations between 10pepper parents were obtained through NCⅡ incomplete diallel cross to analyze the relationship between SSR genetic distance and heterosis. Result] The genetic distance of the parents varied in a range from 0.13 to 0.33, and the average genetic distance was 0.25, indicating that the genetic difference was not obvious among the parents, namely, they shared a close genetic relationship. In addition, the SSR genetic distance was closely related to yield per plant and fruits per plant, but showed no obvious correlation with other traits. Conclusion] This study proved that in a certain range the combinations between the parents with a distant genetic distance possessed stronger heterosis and a larger possibility to produce a high yield and vice versa.