本种加勒比松自由授粉家系的遗传变异分析与早期选择  

Genetic Variation Analysis and Early Selection of the Pinus caribaea var.caribaea Open Pollinated Famlies

作　　者：钟日妹 周保彪 全国栋 徐小珲 黄任泽 陈贰 赵奋成[2,3] 郭文冰[2,3] 

机构地区：[1]湛江市林业良种繁育场,广东遂溪524321 [2]广东省森林病虫害生物防治重点实验室,广东广州510520 [3]广东省林业科学研究院,广东广州510520

出　　处：《林业与环境科学》2016年第3期1-6,共6页Forestry and Environmental Science

基　　金：国家林业局林业公益性行业科研专项"国外松高世代良种培育关键技术研究"(20110414)

摘　　要：根据本种加勒比松(Pinus caribaea var.caribaea)23个自由授粉家系的8 a生子代测定数据,研究其生长性状的遗传变异,结果显示:树高、胸径、单株材积的单株狭义遗传力为0.24、0.14.、0.19,树高、胸径、单株材积、蓄积量的家系平均遗传力为0.68、0.59、0.67、0.75;参试家系间存在极显著生长差异(P<0.01),根据蓄积量选择出5个优良家系,分别是19-Ⅳ、石8、石9、石10、石11,其年均树高1.27 m,年均胸径2.17 cm,每公顷年均蓄积量14.79 m^3,蓄积量的现实选择增益为30.49%、预期遗传增益为22.87%。Genetic variations for growth were estimated for Pinus caribaea var. caribaea from progeny tests comprising 23 open pollinated families assessed as 8 years. The result showed the narrow heritabilities for height, diameter and volume was 0. 24, 0. 14 and 0. 19 and the family heritabilities for height, diameter, volume and stock volume were 0. 68, 0. 59, 0.67 and 0.75. Significant variations were found among the 23 families （ P 〈 0. 01 ）. Five superior top families were selected based on stock volume, which mean annual height and average DBH were 1.27 m and 2. 17 cm, while the mean stem volume per hectare reached 14. 79 m3. Realised gain for the 5 families was 30.59% and predicted genetic gain was 22. 87%.

关 键 词：本种加勒比松 生长性状 遗传力 选择增益 

分 类 号：S791.244[农业科学—林木遗传育种]