异倍体和非异倍体菜豆重复DNA的比较分析。

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
Maria Eduarda Ferraz, Tiago Ribeiro, Mariela Sader, Thiago Nascimento, Andrea Pedrosa-Harand
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引用次数: 0

摘要

结构核型变化是由经常与重复DNA相关的异位重组事件引起的。尽管大多数Phaseolus物种呈现出相对稳定的2n核型 = 22条染色体,瘦端壶菌群物种的核型显示出高的结构重排率,包括嵌套的染色体融合,导致该群的染色体数目异常(2n = 20) 。我们使用基因组浏览数据来表征一系列Phaseolus物种中的重复体,并将其与该组物种(P.Leptostachyus和P.macvaughii)进行比较,研究了重复景观在Leptostachius组物种重排中的作用。LTR逆转录转座子,特别是Ty3/吉普赛谱系色病毒,是基因组中最丰富的元素。macvaughii和Leptostachhyus之间Tekay、Retand和SIRE元素丰度的差异反映在它们的Ty3/gypsy和Ty1/copia总量中。卫星DNA部分在各物种中差异最大,在丰度和分布上都有所不同,甚至在钩端藻和麦氏藻之间也是如此。瘦素组重复序列的快速周转可能与观察到的几种重排有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Comparative analysis of repetitive DNA in dysploid and non-dysploid Phaseolus beans.

Comparative analysis of repetitive DNA in dysploid and non-dysploid Phaseolus beans.

Structural karyotype changes result from ectopic recombination events frequently associated with repetitive DNA. Although most Phaseolus species present relatively stable karyotypes with 2n = 22 chromosomes, the karyotypes of species of the Leptostachyus group show high rates of structural rearrangements, including a nested chromosome fusion that led to the dysploid chromosome number of the group (2n = 20). We examined the roles of repetitive landscapes in the rearrangements of species of the Leptostachyus group using genome-skimming data to characterize the repeatome in a range of Phaseolus species and compared them to species of that group (P. leptostachyus and P. macvaughii). LTR retrotransposons, especially the Ty3/gypsy lineage Chromovirus, were the most abundant elements in the genomes. Differences in the abundance of Tekay, Retand, and SIRE elements between P. macvaughii and P. leptostachyus were reflected in their total amounts of Ty3/gypsy and Ty1/copia. The satellite DNA fraction was the most divergent among the species, varying both in abundance and distribution, even between P. leptostachyus and P. macvaughii. The rapid turnover of repeats in the Leptostachyus group may be associated with the several rearrangements observed.

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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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