青冈种源家系幼龄期生长变异及早期选择研究  

Variation and Selection of Seedling Growth Traits Among Cyclobalanopsis glauca Provenances and Families

作　　者：陈兴彬 涂圣勇 宋晓琛[1] 刘子荣 胡正良 肖复明[1] 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)

机构地区：[1]江西省林业科学院,江西省植物生物技术重点实验室,江西南昌330013 [2]永丰县国家森林公园管理局,江西吉安331500 [3]安福县武功山林场,江西吉安343200

出　　处：《西南林业大学学报（自然科学）》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。

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.

关 键 词：青冈 生长性状 遗传变异 遗传力 早期选择 

分 类 号：S722.5[农业科学—林木遗传育种]