基于近红外预测模型的火炬松材性性状和生长性状遗传评估
Genetic Evaluation of Wood and Growth Traits of Loblolly Pine Based on Near-infrared Prediction Model
杜澄举 1冯志恒 1蒋开彬 1毛积鹏 1黄少伟 1刘天颐1
作者信息
- 1. 华南农业大学林学与风景园林学院,广东省森林植物种质创新与利用重点实验室,广州,510642
- 折叠
摘要
以引自美国火炬松(Pinus taeda)第一代种子园的27个自由授粉家系为研究对象,运用己建立的近红外预测模型测定其木材密度和纤维长度,结合生长调查所得胸径数据,运用R和ASReml软件对火炬松材性性状和生长性状进行遗传评估.结果表明,火炬松木材密度的家系遗传力与单株遗传力分别为0.44± 0.21和0.42±0.17,纤维长度的家系遗传力与单株遗传力分别为0.34±0.18和0.29±0.02,胸径的家系遗传力与单株遗传力分别为0.46±0.16和047±0.52;木材密度和纤维长度的表型及遗传相关系数分别为0.99与0.91,木材密度和纤维长度在表型与遗传上呈极显著正相关,能够实现两个性状的同步遗传改良.经多重比较分析与结合育种值参考,7个同时入选3种性状A组的家系(294,245,246,290,291,232,237)配合选择各组中有明显优势的家系(286,236,290,294)可以作为高密度、长纤维、大胸径火炬松育种群体的候选材料.
Abstract
Taking 27 free-pollinating families from the first-generation seed orchard of American loblolly pine(Pinus tae da)as the research object,using the established near-infrared prediction model to determine the wood density and fiber length,combining with the DBH data obtained from the growth survey,using R and ASReml software for genetic evaluation of loblolly pine wood traits and growth traits.The results showed that the family heritability and individual plant heritability of loblolly pine wood density were 0.44±0.21 and 0.42±0.17,respec-tively.The family heritability and individual plant heritability of fiber length were 0.34±0.18 and 0.29±0.02,re-spectively.Heritability and heritability per plant were 0.46±0.16 and 047±0.52,respectively;the phenotype and ge-netic correlation coefficients of wood density and fiber length were 0.99 and 0.91,respectively.Wood density and fiber length were extremely positive in phenotype and genetics.Correlation,enabling simultaneous genetic im-provement of two traits.After multiple comparative analyses and the combination of breeding values,seven lines(294,245,246,290,291,232,237)selected for all three traits in Group A,together with lines(286,236,290,294)with clear advantages in each of the groups,were found to be suitable as candidates for the breeding population of high density,long fiber and large DBH.
关键词
火炬松/材性性状/胸径/遗传评估Key words
Loblolly pine/Wood properties/Diameter at breast height/Genetic analysis引用本文复制引用
基金项目
国家重点研发项目子课题(2017YFD0600502-3)
出版年
2024
NETL
NSTL
万方数据