楸树与滇楸种间杂交组合苗期性状遗传变异  

Genetic Variation of the Seeding Traits in Interspecific Hybridization of Catalpa bungei and Catalpa fargesii

作　　者：赵鲲 王军辉[2] 焦云德 张建祥 王丽静 

机构地区：[1]洛阳农林科学院,河南洛阳471000 [2]中国林业科学研究院林业研究所,北京100091 [3]河南嵩县五马寺林场,河南洛阳471400

出　　处：《安徽农业科学》2013年第10期4427-4430,共4页Journal of Anhui Agricultural Sciences

基　　金："十一五"国家科技支撑计划课题(2006BAD24B08)

摘　　要：[目的]研究楸树与滇楸种间杂交组合苗期性状遗传变异。[方法]以25株滇楸优树为父本、23株楸树优树为母本,采用常规杂交方法,进行种间杂交育种,对不同杂交组合的可配性及1年生播种移栽苗、两根一干平茬苗的物候期、苗高、胸径进行分析研究。[结果]不同组合的可配性、物候期、苗高、胸径均存在极显著差异。一根一干组合苗高、胸径的遗传力为73.75%、71.83%,二根一干组合苗高、胸径的遗传力为75.79%、60.63%,其遗传特性突出,遗传变异丰富。[结论]苗高遗传力比胸径高。以苗高进行选择和改良能够获得较大的遗传增益。[Objective] To study genetic variation of the seeding traits in interspecific hybridization of Catalpa bungei and Catalpa fargesii.[Method] The crossbred experiment was conducted with 25 Catalpa duclouxii Dode plus as male parent and 23 Catalpa bungei plus as female parent.The experiment was conducted in cross-hybrid breeding between species based on the conventional methods and run analytical studies on the interspecific hybridization of different hybridized combination,1 year-old sprout seedling transplanting,the phenological period of the stumping,the nursery height and the diameter at breast hight(DBH).[Result] The results showed that the effect of crossing combination was significant or highly significant.The family heritabilities of 1 year-old sprout's nursery height and DBH were 73.75% and 71.83%;while the two-year-old sprout were 75.79% and 60.63%.The genetic characteristics is outstanding and the genetic variation is rich.[Conclusion] The heritability of seedling hight is higher than DBH.With seedling height to select and improve could obtain higher genetic profit.

关 键 词：楸树 滇楸 杂交组合 苗期性状 遗传变异 

分 类 号：S792.25[农业科学—林木遗传育种]