马尾松三代测定林抽梢性状的遗传效应及与针叶氮磷钾养分的遗传相关  

Genetic Effects of Shoot Growth and Its Genetic Correlation with N,P and K Contents in Needles of the Third Generation Trial Plantation of Pinus massoniana

作　　者：张振[1] 金国庆[1] 余启新 刘青华[1] 丰忠平 董虹妤 周志春[1] Zhang Zhen Jin Guoqing Yu Qixin Liu Qinghua Feng Zhongping Dong Hongyu Zhou Zhichun(Engineering Research Center of Masson Pine of State Forestry Administration Key Laboratory of Tree Breeding of Zhejiang Research Institute of Subtropical Forestry, Chinese Academy of Forestry Hangzhou 311400 Laoshan Forest Farm of Chun＇ an County,Zhejiang Province Chun＇ an 311700)

机构地区：[1]中国林业科学研究院亚热带林业研究所浙江省林木育种技术研究重点实验室国家林业局马尾松工程技术研究中心,杭州311400 [2]浙江省淳安县老山林场,淳安311700

出　　处：《林业科学》2017年第8期26-34,共9页Scientia Silvae Sinicae

基　　金："十三五"浙江省林木育种专项;国家自然科学基金项目(31600533);"十二五"国家科技支撑课题"南方针叶树高世代育种技术研究与示范"(2012BA01B02);浙江省竹木农业新品种选育重大科技专项"马尾松高世代育种及其品种示范"(2012C12908-12)

摘　　要：【目的】测定分析马尾松三代测定林的抽梢性状及针叶氮磷钾含量,揭示抽梢性状的遗传控制方式,探究针叶中氮磷钾含量与生长的相关关系,为解析马尾松高生长的遗传规律提供理论依据。【方法】利用设置在浙江省淳安县姥山林场的5年生6×6半双列遗传交配设计的马尾松三代种质遗传测定林,对其抽梢性状(初次抽梢生长量、后续抽梢生长量、年抽梢次数及年抽梢长度)、树高及针叶氮磷钾含量进行测定与分析,探究马尾松抽梢性状及针叶养分含量的遗传变异规律及遗传控制方式,揭示抽梢性状间及与针叶氮磷钾含量的遗传相关。【结果】马尾松三代测定林的初次抽梢生长量、后续抽梢生长量、年抽梢次数、年生长量和树高的平均值分别为0.89 m、0.45 m、1.90次、1.34 m和5.16 m,且方差分析结果表明在不同杂交组合间的差异均达到极显著。配合力分析表明,后续抽梢生长量、抽梢次数、年生长量等抽梢性状和树高以加性基因效应控制为主,加性基因效应百分数在52.10%~73.28%,而初次抽梢生长量则几乎完全受显性效应控制(98.32%);针叶养分含量中,钾含量以加性基因效应(69.70%)控制为主,氮磷含量则几乎完全受显性效应控制。抽梢性状、树高与氮磷钾含量受中等及以上程度的遗传控制(hf2=46.54%~84.17%)。性状间及与针叶养分含量的遗传相关分析发现,树高与后续抽梢生长量、抽梢长度及抽梢次数均呈极显著正相关;后续抽梢生长量与抽梢长度、抽梢次数呈极显著正相关;初次抽梢生长量与树高、后续抽梢生长量、抽梢次数呈极显著负相关,与抽梢长度的相关性不显著。针叶氮含量与树高、后续抽梢生长量、抽梢长度及抽梢次数极显著正相关;针叶磷含量与初次抽梢生长量及抽梢长度成极显著正相关;针叶钾含量与抽梢长度呈显著负相关。N/P比与树高、后续抽梢生长�【Objective】Through measuring and analyzing the shoot growth behavior and the content of N,P and K in needles of the young third generation of Masson pine （Pinus massoniana）,this study revealed the mode of genetic control of shoot growth,explored the relationship between the contents of N,P,K and the growth,and provided a theoretical basis for understanding genetic laws of the height growth of Masson pine.【Method】We measured and analyzed the shoot growth behavior （initial shoot growth,subsequent shoot growth,annual shoot number and annual shoot length）,tree height,and N,P and K contents in needles,to explore the genetic variation regularity and genetic control mode of shootgrowth behavior and the needles nutrient content,and to reveal the genetic correlation between the shoot growth traits,and between the shoot growth traits and the needles N,P and K contents,with a half diallel cross among 6 × 6 Masson pine clones in Laoshan forest farm of Zhejiang Province.【Result】The value of initial shoot growth,subsequent shoot growth,annual shoot number,annual shoot length and average tree height were 0.89 m,0.45 m,1.90 times,1.34 m and 5.16 m of trial plantations of the young third generation of Masson pine,respectively.The variance analysis showed that there were very significant differences between different hybrid combinations.The result of combining ability analysis showed that shoot growth behavior,such as,subsequent shoot growth,annual shoot number and annual shoot length,were given priority to additive gene effect control,with the percentage of additive gene effect from 52.10% to 73.28%,while the initial shoot growth was almost entirely controlled by dominant effect （98.32%）.In the nutrient content of needles,K content was controlled mostly by additive gene effect （69.70%）,while the contents of N and P were almost entirely controlled by dominant effect.Shoot growth traits,tree height,N,P and K contents were controlled by medium or above degree of genetic （hf^2= 46.54% – 84.17%）.Thro

关 键 词：马尾松 抽梢性状 针叶养分含量 GCA SCA 遗传相关 

分 类 号：S722.7[农业科学—林木遗传育种]