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首页> 外文期刊>Genetic Resources and Crop Evolution >Velvet bentgrass (Agrostis canina L.) is the likely ancestral diploid maternal parent of allotetraploid creeping bentgrass (Agrostis stolonifera L.)
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Velvet bentgrass (Agrostis canina L.) is the likely ancestral diploid maternal parent of allotetraploid creeping bentgrass (Agrostis stolonifera L.)

机译：天鹅绒草（Agrostis canina L.）是异源四倍体爬行草（Agrostis stolonifera L.）的祖先二倍体母本。

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摘要

Understanding genetic relationships among the three most important Agrostis species will be important in breeding and genomic studies aimed at cultivar improvement. Creeping, colonial, and velvet bentgrasses (Agrostis stolonifera L., A. capillaris L., and A. canina L., respectively) are commercially important turfgrass species often used on golf courses. Velvet bentgrass is a diploid and creeping and colonial bentgrasses are both allotetraploids. A model for the genomic relationships among these species was previously developed from cytological evidence. The genome designations were A1A1 for velvet bentgrass, A1A1A2A2 for colonial bentgrass, and A2A2A3A3 for creeping bentgrass. Here we used phylogenetic analysis based on DNA sequences of nuclear ITS and protein coding genes and the plastid trnK intron and matK gene to reexamine these relationships. In contrast to the previous model, the DNA sequence analysis suggested that velvet bentgrass was closely related to creeping bentgrass and it is likely the maternal parent of creeping bentgrass. Phylogenetic analysis of some conserved nuclear genes revealed a close relationship of the velvet bentgrass sequences with the A2 subgenome sequences of creeping bentgrass. We therefore propose that velvet bentgrass be designated as having the A2 genome, rather than the A1 genome as in the previous model.
机译：了解这三个最重要的草食动物物种之间的遗传关系在旨在改良品种的育种和基因组研究中将非常重要。 bent草，殖民地和天鹅绒草（分别为Agrostis stolonifera L.，A。capillaris L.和A. canina L.）是商业上重要的草皮草种，通常在高尔夫球场上使用。天鹅绒本草是二倍体，爬行和殖民地本草都是同种四倍体。这些物种之间基因组关系的模型先前是根据细胞学证据开发的。天鹅绒草的基因组名称为A 1 A 1 ，A 1 A 1 A 2 < / sub> A 2 用于殖民地弯曲草，而A 2 A 2 A 3 A 3 < / sub>，用于bent草。在这里，我们根据核ITS和蛋白质编码基因的DNA序列以及质体trnK内含子和matK基因进行系统发育分析，以重新检查这些关系。与以前的模型相比，DNA序列分析表明，天鹅绒草与creep草密切相关，并且很可能是bent草的母本。通过对一些保守核基因的系统进化分析，发现天鹅绒草的序列与爬行草的A 2 亚基因组序列密切相关。因此，我们建议将天鹅绒弯曲草指定为具有A 2 基因组，而不是像先前模型那样具有A 1 基因组。

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