森林与环境学报2025，Vol.45Issue(3)：290-297,8.DOI:10.13324/j.cnki.jfcf.202412019
德昌杉与杉木杂交的种实性状变异及遗传参数分析
Variations and genetic parameters of cone and seed traits of Cunninghamia unicanaliculata×C.lanceolata
摘要
Abstract
The variation law and genetic parameters of cone and seed traits of Cunninghamia unicanaliculata×C.lanceolata are studied,which is expected to provide reference and suggestions for the cross breeding of C.lanceolata based on C.unicanaliculata and the construction of hybrid seed orchards.Fifteen superior tree clones of the second-generation C.lanceolata seed orchard of the State-Owned Forest Farm in Hongya County were selected as the female parents,and 8 superior trees in the provincial seed base of C.unicanaliculata and its surrounding plantations in Dechang County were selected as the male parents.Sixty hybrid combinations were obtained by the NCⅡdesign.The cone width,cone length,cone volume,fresh cone weight,fresh cone seeding rate,number of seeds per unit mass of fresh cone,1 000 grain weight,and germination rate were determined for the free pollination families of the hybrid combinations and their parents.The results showed that:(1)there was no significant difference in the cone width,cone length,cone volume,fresh cone weight,and fresh cone seeding rate between hybrids and parents.The number of seeds per unit mass of fresh cone(10.20 grain·g-1)was significantly higher than that of C.lanceolata parents(8.10 grain·g-1)and C.unicanaliculata parents(8.00 grain·g-1)(P<0.05),the 1 000 grain weight(5.27 g)was significantly lighter than that of C.lanceolata parents(6.59 g,P<0.05),and the germination rate(7.47%)was significantly lower than that of C.lanceolata parents(21.13%,P<0.05).The above results were consistent with the number ratio of hybrids with positive/negative heterosis.(2)The genetic effects of the cone and seed traits of hybrids were mainly based on the additive effect of genes.The cone traits,seeding traits,and 1 000 grain weight were more likely to be affected by the female parent(C.lanceolata),while the germination rate was mainly influenced by the male parent(C.unicanaliculata).The interaction effect between parents could not be ignored.(3)The number of seeds per unit mass of fresh cone had significantly negative correlations with the other traits(P<0.01),except which the cone and seed traits had positive correlations or significantly positive correlations between each other(P<0.01).In general,the hybrids have smaller cones but increased seeds,and thus the 1 000 grain weight is lighter and the germination rate is lower.The genetic effects of cone and seed traits are mainly based on additive effects,and the traits except germination rate are mainly affected by the female parent.关键词
德昌杉/杉木/杂交育种/种实性状/变异/遗传参数Key words
Cunninghamia unicanaliculata/Cunninghamia lanceolata/cross breeding/cone and seed traits/variation/genetic parameters分类
林学引用本文复制引用
张锡,张小国,吴华雪,龚育霖,沈鑫,朱鹏..德昌杉与杉木杂交的种实性状变异及遗传参数分析[J].森林与环境学报,2025,45(3):290-297,8.基金项目
四川育种攻关项目"突破性林木育种材料和方法创新及新品育种"(2021YFYZ0032). （2021YFYZ0032）
