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地中海地区的沫蝉属 Philaenus 物种：染色体进化模式。

Mediterranean species of the spittlebug genus Philaenus: modes of chromosome evolution.

机构信息

Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Poland.

出版信息

J Insect Sci. 2012;12:54. doi: 10.1673/031.012.5401.

DOI:10.1673/031.012.5401
PMID:22963598
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3476953/
Abstract

The evolution of karyotypes and sex determination system of Philaenus Stål (Auchenorrhyncha: Aphrophoridae) species is studied here in detail. The most plausible scenario of chromosomal rearrangements accompanying phylogenetic differentiation in Philaenus is advanced. It is postulated that the ancestral karyotype of Philaenus was 2n = 24 + X0. Karyotype changes occurred several times independently in the genus. The karyotype of 2n = 22 + X0 (P. spumarius and P. tesselatus) originated from 2n = 24 + X0 by fusion between two autosomal pairs. The neo-XY system (P. arslani, P. loukasi, P. signatus, P. maghresignus, and P. tarifa) also originated from the 24 + X0 karyotype by means of independent fusions between autosomes and the original X chromosome. The neo-X(1)X(2)Y system (P. italosignus) evolved from the 2n = 22 + neo-XY karyotype by an additional fusion between the Y chromosome and one more autosomal pair. The neo-X(n)Y system of P. italosignus is the first reported case of an evolutionarily fixed multiple sex chromosome system in Auchenorrhyncha.

摘要

本文详细研究了盲蝽科（Auchenorrhyncha：Philaenus）物种的核型和性别决定系统的演化。提出了与 Philaenus 种系分化伴随的染色体重排的最合理假设。假定 Philaenus 的祖先核型为 2n = 24 + X0。核型变化在属内多次独立发生。2n = 22 + X0（P. spumarius 和 P. tesselatus）的核型由 2n = 24 + X0 通过两对常染色体的融合产生。新的 XY 系统（P. arslani、P. loukasi、P. signatus、P. maghresignus 和 P. tarifa）也由常染色体和原始 X 染色体之间的独立融合从 24 + X0 核型产生。新的 X（1）X（2）Y 系统（P. italosignus）由 Y 染色体与另一对常染色体之间的额外融合从 2n = 22 + 新的 XY 核型进化而来。P. italosignus 的新的 X（n）Y 系统是半翅目昆虫中首次报道的进化固定的多性染色体系统。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/856bab3718db/f07_01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/7ea53ef97817/f01_01.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/cab383e9a8b0/f03_01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/78270d8bec28/f04_01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/4e1eaef97460/f05_01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/8c44ab2985f4/f06_01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/856bab3718db/f07_01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/7ea53ef97817/f01_01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/aa40165c51d8/f02_01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/cab383e9a8b0/f03_01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/78270d8bec28/f04_01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/4e1eaef97460/f05_01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/8c44ab2985f4/f06_01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b134/3476953/856bab3718db/f07_01.jpg

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