|国家科技期刊平台
首页|期刊导航|西南林业大学学报|不同种源云南松幼苗性状的异速生长及变异分析

不同种源云南松幼苗性状的异速生长及变异分析OA北大核心CSTPCD

Variation of Growth Traits and Allometric Growth of Seedlings of Pinus yunnanensis from Different Provenances

中文摘要英文摘要

为研究不同种源1~3年生云南松苗木苗高、地径生长变异以及异速生长指数,深入了解云南松苗期性状生长在种源间的变异特点与异速生长关系,对 1~3年生的不同苗龄云南松苗木苗高、地径生长状况进行统计分析以及异速生长关系分析,比较了 3个种源不同龄期云南松苗木性状的生长分化特点和异速生长指数.结果表明:不同苗龄云南松苗木苗高、地径生长在种源间存在极显著变异,性状的变异程度随苗龄的增长整体呈现减弱的趋势且性状间存在极显著的相关性.种源内苗高变异系数随苗龄的增长先增加后降低,整体波动范围为32%~50%,地径变异系数整体波动范围为33%~48%,随苗龄增长呈递减趋势,变异来源中种源内层次的因素随苗龄的增加而减弱.新平种源苗高生长的平均变异系数为46%,高于另外2个种源;不同种源不同苗龄云南松苗木间存在显著的异速生长现象,且异速生长指数是变化的.可见,苗高、地径都存在较为丰富的分化和变异,性状分化程度受时间影响明显.不同种源苗木的两个性状都以种源内变异为主,各种源苗木的变异程度不同,不同龄期苗木会根据自身生长状况调整生长策略以适应对资源的竞争.不同种源苗木异速生长关系在不同苗龄间存在极显著的差异,异速生长指数存在显著差异,随着苗龄的增加,各种源苗木苗高-地径异速生长关系模型从符合弹性自相似拟模型改变为几何相似性模型,符合小个体植株异速生长指数接近 1的结果.异速生长指数随苗木生长而变化,受苗木自身遗传品质和对环境的适应能力等因素综合影响.

The variation in seedling height,ground diameter growth and the variation in anisotropic growth indices of 1-3a Pinus yunnanensis seedlings from different seed sources were studied to gain insight into the dif-ferentiation variation characteristics and anisotropic growth relationships of P.yunnanensis seedling growth among seed sources.Statistical analysis and allometric growth relationship analysis were conducted on the growth of 1-3 years old P.yunnanensis seedlings in terms of height and ground diameter.A comparison was made between the growth differentiation characteristics and the allometric growth index of P.yunnanensis seedlings at different ages from 3 different provenances.The results showed that the seedling height and ground diameter of P.yunnanensis seedlings varied significantly among provenances at different seedling ages,and the variation degree of traits decreased with the growth of seedling ages,and there was a very significant correlation between traits.The variation coefficient of seedling height within provenances first increased and then decreased with the in-crease of seedling age,with the overall fluctuation range of 32%-50%,and the overall fluctuation range of ground diameter variation coefficient was 33%-48%,which showed a decreasing trend with the increase of seedling age.Both traits were dominated by the variation within provenances,and the factors within provenances of the vari-ation sources were weakened with the increase of seedling age.There was abundant variation among different provenances,among which,the mean coefficient of variation of seedling height growth of Xinping provenances was 46%,higher than that of the other 2 provenances.There was a significant allometric growth phenomenon among P.yunnanensis seedlings of different provenances and different seedling ages,and the allometric growth index was variable.There were abundant differentiation and variation in seedling height and ground diameter,and the differentiation degree of characters was obviously affected by time.The 2 traits of the seedlings of different provenances are mainly intra-provenance variation,and the variation degree of the seedlings of different proven-ances is different.The seedlings of different ages will adjust their growth strategies according to their own growth conditions to adapt to the competition for resources.The allometric growth relationship of seedlings from differ-ent seed sources showed significant differences between different seedling ages,and the allometric growth index showed significant differences with common slope.With the increase of seedling ages,the allometric growth rela-tionship model of seedlings from height to ground diameter changed from an elastic self-similar pseudo-model to a geometric similarity model,which was consistent with the result that the allometric growth index of small indi-vidual plants was close to 1.Allometric growth index changes with the growth of seedlings,but is not constant.Seedlings are affected by their own genetic quality and adaptability to the environment.

汪啟波;王德新;贺斌;陆庄跃;杨振欣;郑超凡;王瑜;蔡年辉;许玉兰;金建华

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,云南昆明 650233||西南林业大学西南地区生物多样性保育国家林业和草原局重点实验室,云南昆明 650233云南交通职业技术学院,云南昆明 650500玉溪市易门县十街彝族乡农业农村综合服务中心,云南玉溪 651100

林学

云南松种源性状变异异速生长

Pinus yunnanensisprovenancecharacter variationisometric growth

《西南林业大学学报》 2024 (003)

52-59 / 8

云南省万人计划青年拔尖人才专项(YNWR-QNBJ-2019-075)资助;国家自然科学基金项目(31860203)资助;云南省研究生导师团队建设项目(2022-97)资助;西南林业大学校科研基金(01108-18200133)资助.

10.11929/j.swfu.202304010

评论