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| 湿地松生长性状遗传参数的年度变化趋势 |
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赵奋成,林昌明,吴惠姗,钟岁英,黄永权,郭文冰,李福明,李义良
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广东省森林病虫害生物防治重点实验室；广东省林业科学研究院,台山市红岭种子园,广东省森林病虫害生物防治重点实验室 广州；广东省林业科学研究院,广东省台山红岭种子园,广东省林业种苗与基地管理总站,广东省森林病虫害生物防治重点实验室 广州,广东省林业科学研究院 广州;广东省台山红岭种子园,广东省森林病虫害生物防治重点实验室 广州
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| 摘要: |
| 对广东省台山市红岭种子园内由60个自由授粉家系所建立的湿地松（Pinus elliottii）子代测定林开展了多年度持续观测，根据其2 a、4 a、6 a、17 a、20 a、22 a生的生长性状数据，分析了该林分的生长表现并估算了树高、胸径和材积的遗传参数。主要结果如下：湿地松子代测定林树高、胸径和材积遗传变异系数分别为3.14%～6.87%、3.87%～5.49%、10.12%～14.62%，年度变化趋势表现出较高的一致性；树高、胸径、材积生长受中等程度的遗传控制，其单株狭义遗传力分别为0.27～0.46、0.21～0.38、0.25～0.40，家系平均遗传力分别为0.56～0.74、0.50～0.75、0.56～0.76。总体上生长性状在成熟期（17 a、20 a、22 a生）的遗传力大于在幼龄期（4 a、6 a生）的遗传力； 6 a生树高、胸径、材积与成熟期相同性状的年-年遗传相关系数为0.57～0.74，成熟期树高、胸径、材积的年-年遗传相关系数为0.99～1.00。如果以22 a生材积作为目标性状，4 a生前根据树高，之后根据材积作早期选择，可期望获得较高的选择效益。 |
| 关键词: 湿地松 生长性状 遗传参数 |
| DOI： |
| 分类号:S791.246 |
| 基金项目: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)；“十二五”农村领域国家科技计划专题研究任务“湿地松和湿加松育种及繁育技术研究与示范”(2012BAD01B0203-02)。2 参加本项工作的还有台山红岭种子园廖树森、黄永达、王炳新、罗区富、邓乐平、谭志强,广东省林科院李宪政、张应中、蔡坚,广东省林业厅林新、王华男、张民兴。谨此致谢。 |
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| Annual trend in genetic parameters for growth traits of Pinus elliottii |
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Zhao Fencheng,Lin Changming,Wu Huishan,ZHONG Suiying,Huang Yongquan,Guo Wenbing,Li Fuming and Li Yiliang
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Taishan Hongling Seed Orchard,Guangdong Provincial Key Laboratory of Bio-control for the Forest Disease and Pest,Guangzhou,Guangdong; Guangdong Academy of Forestry,Taishan Hongling Seed Orchard,General Administration Station of Forestry Seed,Seedling and Afforestation Bases of Guangdong Province,Guangdong Provincial Key Laboratory of Bio-control for the Forest Disease and Pest,Guangzhou,Guangdong,Guangdong Academy of Forestry,Guangzhou,Guangdong,;Taishan Hongling Seed Orchard,Guangdong Provincial Key Laboratory of Bio-control for the Forest Disease and Pest,Guangzhou,Guangdong
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| Abstract: |
| The growth performance for the stand and genetic parameters for height, diameter and volume were estimated for Pinus elliottii in the Taishan City, Guangdong Province. The data were from a progeny test comprising 60 half-sib families assessed at 2, 4, 6, 17, 20 and 22 years. The results showed that: (i) the coefficients of variation for height, diameter and volume varied from 3.14% to 6.87%, 3.87% to 5.49%, 10.12% to 14.62%, respectively, and highly consistent at different age; (ii) the height, diameter and volume growth was under moderate genetic control. The individual tree narrow heritabilities for these three traits varied from 0.27 to 0.46, 0.21 to 0.38, 0.25 to 0.40, and the family heritabilities varied from 0.56 to 0.74, 0.50 to 0.75, 0.56 to 0.76, respectively. Generally, the heritabilities were higher at mature ages (at 17, 20, 22 years) than those at young ages (at 4 and 6 years); (iii) estimated age-age genetic correlations between the trait (height, diameter, and volume) at 6 years and the corresponding trait at mature ages varied from 0.57 to 0.74, while the estimated age-age genetic correlations between the traits at different mature ages varied from 0.99 to 1.00. When the volume at 22 years is the target of selection, the early selection based on height before 4 years and then based on volume may be more efficient. |
| Key words: Pinus elliottii, growth traits, genetic parameters |
