林业科学2017，Vol.53Issue(8)：26-34,9.DOI:10.11707/j.1001-7488.20170804
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
摘要
Abstract
[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 shoot growth 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 (hf2 = 46.54%–84.17%). Through studying genetic correlation between the traits,it was found that there was very significant positive correlation between tree height and subsequent shoot growth,annual shoot length and shoot number. There was very significant positive correlation between subsequent shoot growth and annual shoot length and shoot number. There was very significant negative correlation between initial shoot growth and tree height,subsequent shoot growth and annual shoot number. There was no significant correlation between initial shoot growth and annual shoot length. There was very significant positive correlation between the N content in needles and tree height,subsequent shoot growth,annual shoot length and shoot number. There was very significant positive correlation between P content in needles and initial shoot growth and annual shoot length. There was very significant negative correlation between K content in needles and annual shoot length. There was significant positive correlation between N/P ratio and tree height,subsequent shoot growth and annual shoot number. There was very significant positive correlation between N/K ratio and tree height, subsequent shoot growth and annual shoot length; P/K ratio and annual shoot length. [Conclusion]The variation of shoot growth behavior and N,P and K contents in needles were rich in trial plantations of three generation of Masson pine. Subsequent shoot growth,annual shoot number and shoot length,tree height and K content were mostly controlled by additive gene effect. Initial shoot growth,N and P contents were almost entirely controlled by dominant effect. The height growth of trees was affected by shoot growth behavior,especially the subsequent growth was significantly affected by subsequent shoot growth features. The annual shoot length was increased,and therefore the tree height was increased in the year.关键词
马尾松/抽梢性状/针叶养分含量/GCA/SCA/遗传相关Key words
Pinus massoniana/shoot growth behavior/foliar nutrient content/GCA/SCA/genetic correlation分类
农业科技引用本文复制引用
张振,金国庆,余启新,刘青华,丰忠平,董虹妤,周志春..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[J].林业科学,2017,53(8):26-34,9.基金项目
"十三五"浙江省林木育种专项 （）
国家自然科学基金项目(31600533) （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) （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). （2012C12908-12）
