摘要
通过对来源于5省10个种源54个半同胞家系的青冈3年生幼树的4个生长性状进行调查,在分析青冈种源家系间生长性状的遗传变异规律的基础上,进行早期种源和家系选择。结果表明:试验林平均树高为1.19 m,平均地径为1.70 cm,平均冠幅为0.92 m,平均分枝数为8.04。大部分性状在各变异来源间均达到显著水平;不同性状的变异系数11.60%~45.59%;家系遗传力和单株遗传力分别为0.11~0.37和0.06~0.28;各性状间遗传相关达到显著水平或极显著水平;经综合指数法选出2个优良种源和5个优良家系,入选家系的树高、地径、冠幅和分枝数的遗传增益分别为7.35%、6.44%、4.21%和2.14%。幼龄期青冈种源家系间各性状存在丰富的遗传变异,种源家系选择和改良潜力大。初步筛选出湖南城步种源和湖南桑植种源为优良种源,45、44、51、10、52号家系为优良家系。
By testing the genetic variation of growth traits among provenances and families of Cyclobalanopsis glauca and selecting superior provenances and families.In this study,4 growth traits of 3-year-old seedlings of 54 families of C.glauca from 10 provenances of 5 provinces were studied.The findings indicated that the average tree height,ground diameter,crown width and branch number of 3-year-old C.glauca were 1.19 m,1.70 cm,0.92 m and 8.04,respectively.Most of the traits reached significant differences among various sources.The coefficient of variation of these traits ranged from 11.60%to 45.59%.The family heritability and individual heritabil-ity of these traits ranged from 0.11 to 0.37 and from 0.06 to 0.28,respectively.The genetic correlation coefficient between the traits reached significant or extremely significant level.Two superior provenances 5 superior famil-ies were selected by comprehensive index selection.The genetic gains of 4 traits of the families selected were 7.35%,6.44%,4.21%and 2.14%,respectively.The seedling growth traits of C.glauca have rich variations among provenances and families,with the provenance and family selection having great potential.Two superior proven-ances of C.glauca were selected out by the comprehensive selection index,i.e.,one from Chengbu of Hunan and the other from Sangzhi of Hunan.Five excellent families were selected,including No.45,No.44,No.51,No.10 and No.52.
作者
陈兴彬
涂圣勇
宋晓琛
刘子荣
胡正良
肖复明
Chen Xingbin;Tu Shengyong;Song Xiaochen;Liu Zirong;Hu Zhengliang;Xiao Fuming(Jiangxi Provincial Key Lab for Plant Biotechnology,Jiangxi Academy of Forestry,Nanchang Jiangxi 330013,China;Yongfeng National Forest Park Administrative Bureau,Ji'an Jiangxi 331500,China;Wugongshan Forest Farm of Anfu County,Ji'an Jiangxi 343200,China)
出处
《西南林业大学学报（自然科学）》
北大核心
2023年第5期1-7,共7页
Journal of Southwest Forestry University：Natural Sciences
基金
江西省林业科技创新项目(No.201930)资助
南昌市红心杉种质资源保护与利用重点实验室项目(2020-NCZDSL-011)资助
中国林科院基本科研业务专项(CAFYBB2018ZB001-7)资助。
关键词
青冈
生长性状
遗传变异
遗传力
早期选择
Cyclobalanopsis glauca
growth trait
genetic varaition
heritability
early selection
