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    商静, 薛胤轩, 宋连君, 刘春和, 李代丽, 张恒月, 冯旭清, 王君. 青黑杨全同胞杂种功能叶片及气孔性状变异的倍性、基因型和性别效应解析[J]. 北京林业大学学报, 2020, 42(9): 11-18. DOI: 10.12171/j.1000-1522.20200095
    引用本文: 商静, 薛胤轩, 宋连君, 刘春和, 李代丽, 张恒月, 冯旭清, 王君. 青黑杨全同胞杂种功能叶片及气孔性状变异的倍性、基因型和性别效应解析[J]. 北京林业大学学报, 2020, 42(9): 11-18. DOI: 10.12171/j.1000-1522.20200095
    Shang Jing, Xue Yinxuan, Song Lianjun, Liu Chunhe, Li Daili, Zhang Hengyue, Feng Xuqing, Wang Jun. Ploidy, genotype and gender effects of functional leaf and stomatal traits on short branches in full-sib hybrids between section Tacamahaca and sect. Aigeiros of Populus[J]. Journal of Beijing Forestry University, 2020, 42(9): 11-18. DOI: 10.12171/j.1000-1522.20200095
    Citation: Shang Jing, Xue Yinxuan, Song Lianjun, Liu Chunhe, Li Daili, Zhang Hengyue, Feng Xuqing, Wang Jun. Ploidy, genotype and gender effects of functional leaf and stomatal traits on short branches in full-sib hybrids between section Tacamahaca and sect. Aigeiros of Populus[J]. Journal of Beijing Forestry University, 2020, 42(9): 11-18. DOI: 10.12171/j.1000-1522.20200095

    青黑杨全同胞杂种功能叶片及气孔性状变异的倍性、基因型和性别效应解析

    Ploidy, genotype and gender effects of functional leaf and stomatal traits on short branches in full-sib hybrids between section Tacamahaca and sect. Aigeiros of Populus

    • 摘要:
        目的  探讨倍性水平、性别、基因型及环境效应对青黑杨全同胞杂种短枝功能叶片及气孔性状变异的影响,解析杨树异源三倍体的性状遗传与变异规律。
        方法  以‘哲引3号杨’× ‘北京杨’全同胞杂种二倍体和三倍体的10年生种质保存林为材料,对其短枝功能叶片和气孔相关性状变异进行分析。
        结果  短枝功能叶片和气孔各性状的无性系重复力均较高,介于0.789 ~ 0.960之间,受较强的遗传控制,环境影响较小。叶片和气孔各性状在无性系间均存在极显著差异,其中叶片宽度和气孔宽度变异系数较低,是所测性状中较稳定的遗传特征。三倍体植株叶片长度、叶片宽度、叶面积、气孔长度和气孔宽度均极显著大于二倍体,气孔密度极显著小于二倍体,而三倍体植株的叶柄长度和锯齿数与二倍体无显著差异。叶片及气孔性状在不同性别植株之间均无显著差异。相关性分析结果显示,叶片长度、叶片宽度、叶面积、气孔长度和气孔宽度与倍性水平呈极显著正相关;气孔密度与倍性水平呈极显著负相关;而叶柄长度和锯齿数与倍性水平无显著相关性。方差贡献率显示,无性系性别对叶片及气孔性状的影响最小;气孔性状受倍性效应影响最大,其次是基因型效应;叶片性状主要受基因型效应的影响,其次是倍性效应和环境效应。
        结论  青黑杨全同胞杂种三倍体植株短枝功能叶片及气孔性状变异主要来源于倍性效应和基因型效应,环境和性别影响较小,无性系间存在丰富的性状变异,在杨树三倍体育种时基于遗传测定进行“大群体,强选择”育种十分必要。

       

      Abstract:
        Objective  This paper aims to analyze the inheritance and variation rules of allotriploid poplar, explore the effects of ploidy level, gender, genotype and environmental effects on the variation of short branch functional leaf and stomatal characters in full-sib diploid and triploid hybrids between section Tacamahaca and sect. Aigeiros of Populus.
        Method  In this study, variations of short branch functional leaf and stomatal traits between full-sib diploid and triploid hybrids of 10-year-old clone experimental forest of P. pseudo-simonii × P. nigra ‘Zheyin3#’ and P. × beijingensis were analyzed.
        Result  Clonal repeatability of short branch functional leaf and stomata was high, ranging from 0.789 to 0.960, which was controlled by strong heredity and had little environmental impact. There were very significant differences among clones in leaf and stomatal traits. The variation coefficient of leaf width and stomatal width was lower, which was a relatively stable genetic feature among the tested traits. The leaf length, leaf width, leaf area, stomatal length and stomatal width of triploid were extremely significantly larger than those of diploid, and the stomatal density was extremely significantly smaller than diploids, while the petiole length and serration number of triploids were not significantly different from diploid. There was no significant difference in leaf and stomatal traits between different gender plants. Correlation analysis results showed that leaf length, leaf width, leaf area, stomatal length and width were very significantly positively correlated with ploidy level, stomatal density was very significantly negatively correlated with ploidy level, while petiole length and serration number were not significantly correlated with ploidy level. The variance contribution rate showed that the gender effect of clones had the least influence on leaf and stomatal characters; stomatal traits were mostly affected by ploidy effect, followed by genotype effect; leaf traits were mainly affected by genotype effect, followed by ploidy and environmental effects.
        Conclusion  The variation of short branch functional leaf and stomatal traits of full-sib hybrid between section Tacamahaca and sect. Aigeiros of Populus was mainly come from ploidy effect and genotype effect, but the influence of gender and environment was small. There were abundant trait variations among clones. It is necessary to carry out “large population, strong selection” breeding based on genetic determination in triploid breeding of Populus.

       

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