ABSTRACT

To understand the reliability of genetic determination and early selection of Pinus koraiensis, the genetic variation of growth traits of 34 full-sib families in different growth year were investigated and analyzed. The results showed significant differences in female and male parents and their interaction at different ages, and genetic variance components of growth traits between families accounted for over 50% of the total genetic variation. The phenotypic and genotypic coefficients of variation ranged from 8.61% to 27.29%, and from 6.71% to 19.96%, respectively. Meanwhile, broad-sense heritability and narrow-sense heritability ranged from 0.951–0.999, and from 0.566–0.681, respectively. Correlation analysis shown significant positive correlation coefficients between H, DBH, and V at different ages. Using the multiple-traits comprehensive evaluation method, seven families were selected in different ages. The estimated results of combining ability shown that female parent, male parent and parental combination were F 4, M 11 and F 9 × M 14, respectively. Therefore, the early genetic determination and selection of P. koraiensis could greatly shorten the breeding cycle, improve breeding efficiency, which could provide references for the early genetic determination of other tree species with long rotation age.

摘要

了解红松遗传测定和早期选择的可靠性,对34个全同胞家系不同生育年生长性状的遗传变异进行了调查分析。结果表明，不同年龄的雌性和雄性亲本及其相互作用存在显着差异，家系间生长性状的遗传变异成分占总遗传变异的50%以上。表型和基因型变异系数的范围分别为 8.61% 至 27.29% 和 6.71% 至 19.96%。同时，广义遗传力和狭义遗传力的范围分别为 0.951-0.999 和 0.566-0.681。相关分析显示不同年龄H、DBH和V之间存在显着的正相关系数。采用多性状综合评价法，选取了7个不同年龄的家系。配合力估计结果表明，母本、父本和亲本组合分别为F 4、M 11 和F 9 × M 14。因此，早期的基因决定和选择红松可大大缩短育种周期，提高育种效率，可为其他长轮作树种的早期遗传鉴定提供参考。