马尾松巢式交配子代生长和木材基本密度遗传分析  

Genetic Analysis of Growth and Wood Density of Progeny of Nested Mating Pinus massoniana

作　　者：谭小梅[1,2] 金国庆[1] 邵纪清 余家中 陆名革 周志春[1] 

机构地区：[1]中国林业科学研究院亚热带林业研究所,富阳311400 [2]重庆市林业科学研究院,重庆400036 [3]浙江省淳安县富溪林场,淳安311700

出　　处：《林业科学》2011年第6期30-35,共6页Scientia Silvae Sinicae

基　　金："十一五"国家科技支撑专题"高产优质多抗马尾松新品种选育"(2006BAD01A1403);国家自然科学基金项目(30872041)

摘　　要：以浙江淳安县富溪林场马尾松巢式交配设计的12年生遗传测定林为试材,分析其生长和木材基本密度等主要经济性状父本/母本效应和加性/显性效应。结果表明:除树干通直度外,不同杂交组合间、父本间以及相同父本不同母本间的生长与木材基本密度等存在显著的遗传差异。胸径、树高和单株材积及树干圆满度同时受到父本和母本效应的影响,且二者效应差异较小,而木材基本密度则主要受母本效应的影响,其母本效应是父本效应的1.56倍。马尾松胸径和木材基本密度以加性效应控制为主,显性效应次之,而树高、单株材积和树干圆满度几乎完全由加性效应控制,可依据亲本表现对其子代进行预测。然而比较分析发现,不同杂交组合和父本无性系其生长与木材基本密度的相关性较小,速生的杂交组合和父本无性系并不一定具有较低木材基本密度。各杂交组合生长表现与父本无性系GCA之间相关性不明显,但选配GCA高的父本无性系将会提高获得优良组合的机率。以干物质积累量和胸径等为选择指标,分别选出纸浆纤维材和锯材各10个优良杂交组合,及17个和13个优良单株。Male and female parents effects, additive effect and dominant effect of growth traits and wood basic density were investigated in a progeny test forest of 12-year-old Pinus massoniana with nested mating design in Chunan county of Zhejiang. The results showed that, except for stem straightness, there existed significant differences in growth rate and wood quality among the crossing combinations, male and female/male parents. Male and female parent effects all worked on DBH, height, individual volume and stem fullness simultaneously, but there was little difference between the parents effect. For wood basic density, female parent effect was 1.56 times as large as male parents. DBH and wood basic density of P. massoniana were primarily controlled by additive effect, and then dominant effect, but height, individual volume and stem fullness were almost completely controlled by additive effect, and progeny performance could be predicted by the parents performance. The comparative analysis showed that there was little correlation between growth and wood basic density in different crossing combinations and male parent clones. The fast-growing male parents and crossing combinations did not always had low wood basic density. The correlation between growth performance of crossing combinations and GCA of male parents was not obvious, but the probability to get superior crossing combinations would be raised through selecting male parents with high GCA to hybridize. Ten superior crossing combinations and 17 and 13 superior individuals respectively for pulp wood and saw timber were selected based on wood dry matter and DBH.

关 键 词：马尾松 巢式交配设计 生长 木材基本密度 遗传分析 

分 类 号：S718.46[农业科学—林学] S722.34