Google

蓝海人类学在线 Ryan WEI's Forum of Anthropology

 找回密码
 注册
查看: 4068|回复: 2

亞洲家雞的mtDNA單倍群

[复制链接]
发表于 2010-6-20 00:53 | 显示全部楼层 |阅读模式
Vietnamese chickens: a gate towards Asian genetic diversity

C. Berthouly-Salazar et al.

摘要: http://www.biomedcentral.com/1471-2156/11/53/abstract
全文閱讀: http://www.biomedcentral.com/content/pdf/1471-2156-11-53.pdf
poultryDNA.png
 楼主| 发表于 2010-6-20 01:37 | 显示全部楼层
Abstract:

Background:
Chickens represent an important animal genetic resource and the conservation of local breeds is an issue for the preservation of this resource. The genetic diversity of a breed is mainly evaluated through its nuclear diversity. However, nuclear genetic diversity does not provide the same information as mitochondrial genetic diversity. For the species Gallus gallus, at least 8 maternal lineages have been identified. While breeds distributed westward from the Indian subcontinent usually share haplotypes from 1 to 2 haplogroups, Southeast Asian breeds exhibit all the haplogroups. The Vietnamese Ha Giang (HG) chicken has been shown to exhibit a very high nuclear diversity but also important rates of admixture with wild relatives. Its geographical position, within one of the chicken domestication centres ranging from Thailand to the Chinese Yunnan province, increases the probability of observing a very high genetic diversity for maternal lineages, and in a way, improving our understanding of the chicken domestication process.

Results:
A total of 106 sequences from Vietnamese HG chickens were first compared to the
sequences of published Chinese breeds. The 25 haplotypes observed in the Vietnamese HG population belonged to six previously published haplogroups which are: A, B, C, D, F and G. On average, breeds from the Chinese Yunnan province carried haplotypes from 4.3 haplogroups. For the HG population, haplogroup diversity is found at both the province and the village level (0.69). The AMOVA results show that genetic diversity occurred within the breeds rather than between breeds or provinces. Regarding the global structure of the mtDNA diversity per population, a characteristic of the HG population was the occurrence of similar pattern distribution as compared to G. gallus spadiceus. However, there was no geographical evidence of gene flow between wild and domestic populations as observed when microsatellites were used.

Conclusions:
In contrast to other chicken populations, the HG chicken population showed very high genetic diversity at both the nuclear and mitochondrial levels. Due to its past and recent history, this population accumulates a specific and rich gene pool highlighting its interest and the need for conservation.
发表于 2010-6-21 09:38 | 显示全部楼层
看图看了半天发现很奇怪,然后才发现说的是鸡。
您需要登录后才可以回帖 登录 | 注册

本版积分规则

小黑屋|手机版|Archiver|人类生物学在线 ( 苏ICP备16053048号 )

GMT+8, 2019-12-9 00:50 , Processed in 0.174378 second(s), 21 queries .

Powered by Discuz! X3.4

© 2001-2017 Comsenz Inc.

快速回复 返回顶部 返回列表