Comparison, Selection and Progeny Test of Natural Populations of White Birch (Betula platyphylla Suk.) in Northern China  

作　　者：Shibo LAN 

机构地区：[1]The Forestry Research Institute of Heilongjiang Province

出　　处：《Agricultural Biotechnology》2019年第4期113-118,共6页农业生物技术（英文版）

基　　金：Supported by Heilongjiang Provincial Science and Technology Department Project(GC04B116);National Forest Tree Germplasm Resource Platform Running Service Project(2011DKA21003-02);National Forestry Public Welfare Industry Research Project(201204307-07)

摘　　要：[Objectives]This study was conducted to rationally and effectively use natural genetic resources of white birch(Betula platyphylla Suk.),and improve the scientific and technological content of improved varieties.[Methods]With the progeny of the white birch populations naturally distributed in northern China as objects,based on genetic effect analysis and comprehensive evaluation,the genetic variation,heritability and genetic gain of the growth characters in the progeny forest were systematically analyzed,by which populations or individuals with good growth vigor and strong stress resistance and adaptability were finally selected.[Results]There were extremely significant differences in the growth characters between the natural populations of white birch in northern China.The variation was the smallest in tree height,followed by crown width,and largest in DBH,and the average coefficients of variation were 20.56%,32.25%and 33.00%,respectively.The differences in characters between progeny of the same population were also extremely significant.The growth characters of white birch were more controlled by genes,and the genetic gains were larger.The heritability of tree height,DBH and crown width was 0.971,0.816 and 0.576,respectively,and the genetic gains were 15.97%,21.54%and 13.87%,respectively.[Conclusions]With the growth characters as the main evaluation indexes,taking various influencing factors into account,the Shanxi[SX]population,Hebei[HB]population and Liaoning[LN]population were selected to be excellent populations,and LN305,SX516 and HB403 were excellent individuals,which are advised to be widely used in multi-generation genetic improvement breeding.[Objectives] This study was conducted to rationally and effectively use natural genetic resources of white birch(Betula platyphylla Suk.), and improve the scientific and technological content of improved varieties. [Methods] With the progeny of the white birch populations naturally distributed in northern China as objects, based on genetic effect analysis and comprehensive evaluation, the genetic variation, heritability and genetic gain of the growth characters in the progeny forest were systematically analyzed, by which populations or individuals with good growth vigor and strong stress resistance and adaptability were finally selected. [Results] There were extremely significant differences in the growth characters between the natural populations of white birch in northern China. The variation was the smallest in tree height, followed by crown width, and largest in DBH, and the average coefficients of variation were 20.56%, 32.25% and 33.00%, respectively. The differences in characters between progeny of the same population were also extremely significant. The growth characters of white birch were more controlled by genes, and the genetic gains were larger. The heritability of tree height, DBH and crown width was 0.971, 0.816 and 0.576, respectively, and the genetic gains were 15.97%, 21.54% and 13.87%, respectively. [Conclusions] With the growth characters as the main evaluation indexes, taking various influencing factors into account, the Shanxi[SX]population, Hebei[HB] population and Liaoning[LN] population were selected to be excellent populations, and LN305, SX516 and HB403 were excellent individuals, which are advised to be widely used in multi-generation genetic improvement breeding.

关 键 词：BETULA platyphylla Suk. Natural population COMPARISON and SELECTION PROGENY test GENETIC effect GENETIC gain 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]