摘要
本研究通过对营建于赣北地区的火炬松引种家系子代测定林4年生时的树高、胸径和材积生长进行调查分析,结果表明:火炬松引种家系总体保存情况完好,平均保存率达到了91.11%;火炬松引种家系生长良好,平均树高3.9 m、平均胸径6.6 cm、平均材积0.0072 m3;火炬松引种家系在树高、胸径和材积生长性状上均表现出极显著差异。通过ASReml软件估算的火炬松树高的家系遗传力和单株遗传力分别为0.7151±0.1150和0.5054±0.2290,胸径的家系遗传力和单株遗传力分别为0.6820±0.1284和0.4373±0.2124,单株材积的家系遗传力和单株遗传力分别为0.7189±0.1136和0.4919±0.2224。据BLUP估计的参试火炬松家系性状育种值进行估计和排名,确定12号和13号家系为最优家系,平均树高遗传增益为7.72%,平均胸径遗传增益为10.43%,平均材积遗传增益为26.49%。
In this study,the tree height,DBH and volume of the progeny of the introduced families of Pinus taeda in northern Jiangxi Province were investigated and analyzed.The results showed that the overall preservation of the introduced families of P.taeda was intact,with an average preservation rate of 91.11%.The introduced P.taeda families grew well,with an average tree height of 3.9 m,an average DBH of 6.6 cm and average volume of 0.0072 m3.There were significant differences in tree height,DBH and volume in the introduced families of P.taeda.The family heritability and individual plant heritability estimated by ASReml software were 0.7151±0.1150 and 0.5054±0.2290 for tree height,0.6820±0.1284 and 0.4373±0.2124 for DBH,and 0.7189±0.1136 and 0.4919±0.2224 for volume.According to the breeding values of the tested P.taeda families estimated by BLUP,families 12 and 13 were determined to be the best families,with an average genetic gain of 7.72%for tree height,10.43%for DBH and 26.49%for volume.
作者
施茂寅
钟东洋
梁辉
杨春霞
Shi Maoyin;Zhong Dongyang;Liang Hui;Yang Chunxia(JiangXi Forestry Technology Promotion and Education Center,Nanchang Jiangxi 330038,China;Jiangxi Academy of Forestry,Nanchang Jiangxi 330013,China)
出处
《南方林业科学》
2023年第1期30-33,共4页
South China Forestry Science
基金
中央财政林业科技推广示范项目(项目编号:JXTG〔2022〕14号)
江西省林业厅林业科技创新专项(项目编号:201601)。
