不同株高野生无芒雀麦表型特征及生物量分配研究
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国家牧草产业体系项目(CARS34)


Phenotype Characteristics and Biomass Allocation of Wild Bromus inermis with Different Plant Heights
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    摘要:

    株高的分化是植物对环境长期适应性的结果,通过研究植物表型及生物量分配对株高大小的响应规律有助于了解种质资源多样性。该研究以野生无芒雀麦(Bromus inermis)为研究材料,通过方差分析、变异系数及线性回归模型等分析方法对小株、中株、大株3种株高无芒雀麦的8个表型性状指标以及各构件生物量进行测定分析,以探讨株高差异对表型及生物量分配的影响。结果表明:(1)随着株高的增加分蘖数减少46.7%,而茎粗、茎节数、穗长以及小穗长均不同程度增加,且表型性状中分蘖数变异程度最大(106.32%)。(2)各构件生物量变异程度与株高之间无显著关系,但小株将更多生物量投入到叶和地下器官中,中株和大株则投入到穗和茎器官中;地上、地下生物量之间呈线性增长关系。(3)除小穗宽及根长外,其他表型性状、穗生物量及地上生物量存在显著的大小依赖效应(P<0.05)。

    Abstract:

    The differentiation of plant height is the result of longterm adaptability of plants to environment. It is helpful to understand the diversity of germplasm resources by studying the response of plant phenotype and biomass distribution to plant size. Based on the research materials of wild Bromus inermis, we studied 8 phenotypic traits and biomass of 3 species of small, medium and large plants, and investigated the effect of plant height difference on phenotype and biomass distribution by ANOVA, coefficient of variation and linear regression model. The results show: (1) with the increase of plant height, the number of tillers decreased by 46.7%, stem diameter, number of stem nodes, panicle length and spikelet length were the opposite, and the variation of tiller number among these phenotypic traits was the greatest can reach 106.32%. (2) There was no significant relationship between the biomass variation of each component and plant height. The small plants put more biomass into leaf and underground organs, medium and large plants put into panicle and stem organs. There is a linear growth relationship between aboveground and underground biomass. (3) In addition to spikelet width and root length, other phenotypic traits, panicle biomass and aboveground biomass have sizedependent effects (P<0.05).

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刘文昊,靳瑰丽,宫 珂,等.不同株高野生无芒雀麦表型特征及生物量分配研究[J].西北植物学报,2020,40(12):2122-2129

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  • 在线发布日期: 2021-01-26
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