| 2年生云南松实生苗生物量家系间变异研究 |
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| 引用本文： | 魏巍,蔡年辉,李根前,郑畹,许玉兰,李孙玲,陈诗,王磊,孙睿.2年生云南松实生苗生物量家系间变异研究[J].西部林业科学,2021(1). |
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| 作者姓名： | 魏巍 蔡年辉 李根前 郑畹 许玉兰 李孙玲 陈诗 王磊 孙睿 |
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| 作者单位： | 云南省林业和草原科学院;西南林业大学西南山地森林资源保育与利用教育部重点实验室 |
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| 基金项目： | 云南省林业和草原科学院研究团队项目(LKYTD-2020-002);云南省重点研发计划2018BB006;国家林业和草原局经济研究中心项目(JYF2018-01)。 |
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| 摘 要： | 以20个云南松半同胞家系的2 a生实生苗为研究对象,对其生物量的累积与分配在家系层次的变异规律进行研究,以期为科学评价云南松苗木质量和提高遗传改良的潜在增益提供依据。结果表明,20个云南松半同胞家系2 a生实生苗的生物量累积与分配指标,在家系间均达到显著或极显著水平的差异。根干重、茎干重、叶干重、地上干重、全株干重、根分配、茎分配、叶分配、地上地下生物量比9个生物量指标的表型分化系数为57.74%~92.86%,家系间方差分量百分比为12.77%~34.03%,变异系数为7.78%~55.40%。叶分配比例的遗传力最高(0.62),其次是地上地下生物量比(0.60)。以地上地下生物量比为依据进行优良性状选择可获遗传增益最高(14.31%)。具较大生物量的苗木,其针叶和茎生物量分配的范围集中在50%和40%附近,对应的根茎比在5.0~10.0之间。
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| 关 键 词： | 云南松 家系 生物量 遗传变异 |
The Variation of Biomass of Two-year Seedlings among Families of Pinus yunnanensis |
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| WEI Wei,CAI Nian-hui,LI Gen-qian,ZHENG Wan,XU Yu-lan,LI Sun-ling,CHEN Shi,WANG Lei,SUN Rui.The Variation of Biomass of Two-year Seedlings among Families of Pinus yunnanensis[J].Journal of West China Forestry Science,2021(1). |
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| Authors: | WEI Wei CAI Nian-hui LI Gen-qian ZHENG Wan XU Yu-lan LI Sun-ling CHEN Shi WANG Lei SUN Rui |
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| Institution: | (Yunnan Academy of Forestry and Grassland,Kunming Yunnan 650201,P.R.China;Key laboratory for Forest Resources Conservation and Utilization in the Southwest Forestry University,Kunming Yunnan 650224,P.R.China) |
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| Abstract: | In this paper,the variation law of biomass accumulation and allocation at the family level of two-year seedlings from 20 half-sib families of Pinus yunnanensis was studied in order to provide a basis for scientific evaluation of the quality of P.yunnanensis Seedlings and the potential gain of genetic improvement.The results showed that:The biomass accumulation and allocation indexes of the two-year seedlings of the half-sib families of P.yunnanensis were significant or extremely significant.The differentiation coefficient of phenotypic traits of the 9 indexes were between 57.74%and 92.86%,the variance components among families were between 12.77%and 34.03%,the coefficient of variation were between 7.78%and 55.40%;The genetic force of the biomass allocation of leaf was the highest(0.62),followed by stem root ratio(0.60).If the family is selected artificially according to the above and belowground biomass allocation,the genetic gain can be highest(14.31%).For the seedlings with larger biomass,the biomass allocation of coniferous leaf and stem biomass is concentrated around 50%and 40%,and the corresponding the above and underground biomass allocation is between 5.0 and 10.0. |
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| Keywords: | Pinus yunnanensis family biomass genetic variation |
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