亚热带农业研究2023，Vol.19Issue(4)：217-224,8.DOI:10.13321/j.cnki.subtrop.agric.res.2023.04.001
杉木第3代种子园自由授粉家系的遗传变异及早期选择
Genetic variation and early selection of open pollination progeny of Cunninghamia lanceolata in 3rd generation seed orchard
摘要
Abstract
[Purpose]Open pollination progeny of Chinese fir in the 3rd generation seed orchard were analyzed on genetic variation of growth traits to screen excellent fast-growing families and individual plants.[Method]Genetic testing was conducted on open pollination progeny of Chinese fir in the 3rd generation seed orchard of Fujian Youxi State-owned Forest Farm.Based on tree height,diameter at breast height(DBH),and individual tree volume of 10-year-old Chinese fir,their genetic variations of growth traits were analyzed,followed by the selection of family and individual with excellent early growth performance.[Result]The average annual growth of tree height and DBH of Chinese fir tested plantation both steadily increased from the 1st year to the 5th year,reaching 0.99 m and 1.4 cm at the 5th year,respectively;at the 10th year,the average tree height,DBH and individual tree volume arrived at 8.66 m,12.1 cm,and 0.076 37 m3,respectively,with average annual growth rates of 0.87 m,1.2 cm,and 0.007 64 m3,respec-tively.The 10-year-old test plantation had broad heritability of tree height,DBH,and individual tree volume at 0.523,0.585 and 0.599,and narrow heritability at 0.235,0.278 and 0.285,respectively,implying significant genetic control on growth traits.Basing on the criteria of individual tree volume with genetic gain higher than 5%,20 fast-growing families were selected;their average tree height,DBH and tree volume were 9.21 m,14.1 cm and 0.104 30 m3,with genetic gains of 1.48%,4.51%and 10.42%,respec-tively.On the basis of individual tree volume with genetic gain higher than 60%,20 fast-growing individuals were selected;their av-erage tree height,DBH and individual tree volume reached 12.88 m,23.6 cm and 0.295 34 m3,respectively,with genetic gain of 11.45%,26.48%and 81.71%,respectively.[Conclusion]The selected fast-growing families and individuals demonstrated obvious growth advantages with high application in afforestation,and can be used as important genetic resources for the 4th generation breed-ing materials or clone breeding of Chinese fir.关键词
杉木/家系/遗传变异/第3代种子园/早期选择Key words
Cunninghamia lanceolata/family/genetic variation/3rd generation seed orchard/early selection分类
农业科技引用本文复制引用
蔡世锋..杉木第3代种子园自由授粉家系的遗传变异及早期选择[J].亚热带农业研究,2023,19(4):217-224,8.基金项目
福建省林业科学研究项目"杉木第 4 代育种及良种高效繁育技术"(闽林科便函[2016]35-8 号) （闽林科便函[2016]35-8 号）
福建省林业科技项目"杉木第 4代育种研究与应用"(闽林文[2022]52 号,ZMGG-0701) （闽林文[2022]52 号,ZMGG-0701）
福建省林业科学研究项目"基于小班为经营单位的杉木人工林精准培育技术及示范"(闽林科便函[2021]2 号). （闽林科便函[2021]2 号）
