杉木自由授粉后代测定及多性状选择

OPEN POLLINATION PROGENY TESTING AND MULTIPLE-TRAITS SELECTION ON CHINESE FIR

以八年生54个杉木自由授粉家系为研究材料,分析了杉木主要经济性状在家系间的差异,以及杉木数量性状的遗传变异、遗传相关,进一步为杉木遗传改良提供了证据。运用指数选择法,就生长和形质两个方面综合评定了杉木家系表现,评选出了16个速生优质的杉木家系,供生产实践上推广应用。

Open pollination progeny testing of 54 families of 8-year-old Chinese Fir was conducted. The main economic traits including growth development and trunk-shape were measured in order to find out: (1) the differences between different traits of Chinese Fir families;(2) genetic variation of quantitative traits among the families; (3)and at last, by using of Index Selection Method, 16 fast-growing families with higher qualities were assessed. The genetic gain in the selective index values reached 20.17%. The results also show that Index Selection Method is very effective.