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首页> 外文期刊>Phycologia >Analysis of polygenic traits of Microcystis aeruginosa (Cyanobacteria) strains by Restricted Maximum Likelihood (REML) procedures: 1. Size and shape of colonies and cells
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Analysis of polygenic traits of Microcystis aeruginosa (Cyanobacteria) strains by Restricted Maximum Likelihood (REML) procedures: 1. Size and shape of colonies and cells

机译：限制性最大似然法（REML）分析铜绿微囊藻（蓝藻）菌株的多基因性状：1.菌落和细胞的大小和形状

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摘要

Traditionally, morphometrical traits are used to classify cyanobacteria. However, neither the importance of genetic factors in morphological variability nor genetic correlations between different morphometrical traits are known. Six morphometrical traits of individual cells and six morphometrical traits of colonies have been measured in 21 strains of Microcystis aeruginosa. A fixed model and a mixed model allowing genetic relationships between traits were both used to estimate genetic and residual correlations, and genetic variance/total phenotypic variance ratios were used to estimate the 12 morphometrical traits. Results showed that (1) colony size has a low genetic correlation with traits of individual cells; (2) traits measured on individual cells present a higher genetic variance/total phenotypic variance ratio than the corresponding trait in colonies; and (3) genetic correlations between directly measured traits (maximal diameter and axis, minimal diameter and axis, perimeter, and surface) are so high that they may be considered different expressions of the same underlying trait, namely size, so any one of them could be used without significant loss of information, instead of all of them. Fixed and mixed models showed the same conclusions, although mixed models preferably should be used because they take into account the common random genetic basis of traits. Maximal cell diameter was used as a discriminator trait for studying morphological differences between strains from different origins. Results suggest that environment may modulate strain mixtures in Microcystis populations.
机译：传统上，形态计量学特征用于对蓝细菌进行分类。然而，既不知道遗传因素在形态变异性中的重要性，也不知道不同形态特征之间的遗传相关性。在铜绿微囊藻的21株菌株中，已测量出六个细胞的形态学特征和六个菌落的形态学特征。固定模型和允许性状之间遗传关系的混合模型都用于估计遗传和残留相关性，遗传方差/总表型方差比用于估计12个形态计量性状。结果表明：（1）菌落大小与单个细胞性状的遗传相关性较低； （2）在单个细胞上测得的性状比群体中相应的性状具有更高的遗传方差/总表型方差比； （3）直接测量的特征（最大直径和最大轴，最小直径和最大轴，周长和表面）之间的遗传相关性很高，以至于它们可能被视为同一基本特征（即大小）的不同表达，因此它们中的任何一个可以使用这些信息，而不会丢失所有信息。固定模型和混合模型得出相同的结论，尽管最好使用混合模型，因为它们考虑了性状的共同随机遗传基础。使用最大细胞直径作为区分性状，研究来自不同来源的菌株之间的形态差异。结果表明环境可能会调节微囊藻种群中的菌株混合物。

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