印度查谟和克什米尔邦达奇加姆国家公园内克什米尔马鹿(Cervus elaphus hanglu)的遗传多样性丧失与近亲繁殖现象

Loss of genetic diversity and inbreeding in Kashmir red deer (Cervus elaphus hanglu) of Dachigam National Park, Jammu & Kashmir, India.

作者信息

Sharma Lalit K, Kumar Ved P, Charoo Samina A, Mohan Nipun, Goyal Surendra P, Sathyakumar Sambandam

出版信息

BMC Res Notes. 2013 Aug 16;6:326. doi: 10.1186/1756-0500-6-326.

Abstract

BACKGROUND

Hangul (Cervus elaphus hanglu), the eastern most subspecies of red deer, is now confined only to the mountains in the Kashmir region of Jammu & Kashmir State of India. It is of great conservation significance as this is the last and only hope for Asiatic survivor of the red deer species in India. Wild population of free ranging hangul deer inhabiting in and around Dachigam National Park was genetically assessed in order to account for constitutive genetic attributes of hangul population using microsatellite markers.

RESULTS

In a pool of 36 multi-locus genotypes, 30 unique individuals were identified based on six microsatellite loci. The estimated cumulative probability of identity assuming all individuals were siblings (PID sibs) was 0.009 (9 in 1000). Altogether, 49 different alleles were observed with mean (± s.e.) allelic number of 8.17 ± 1.05, ranging from 5 to 11 per locus. The observed heterozygosity ranged between 0.08 and 0.83, with mean 0.40 ± 0.11 and the inbreeding coefficient ranged between -0.04 and 0.87 with mean 0.38 ± 0.15. Majority of loci (5/6) were found to be informative (PIC value > 0.5). All loci deviated from Hardy-Weinberg equilibrium except Ca-38 (P > 0.05) and none of the pairs of loci showed significant linkage disequilibrium except the single pair of Ca-30 and Ca-43 (P < 0.05).

CONCLUSIONS

The preliminary findings revealed that hangul population is significantly inbred and exhibited a low genetic diversity in comparison to other deer populations of the world. We suggest prioritizing the potential individuals retaining high heterozygosity for ex situ conservation and genetic monitoring of the hangul population should be initiated covering the entire distribution range to ensure the long term survival of hangul. We speculate further ignoring genetics attributes may lead to a detrimental effect which can negatively influence the reproductive fitness and survivorship of the hangul population in the wild.

摘要

背景

罕山鹿(Cervus elaphus hanglu)是马鹿最东部的亚种,现仅存于印度查谟和克什米尔邦克什米尔地区的山区。它具有重大的保护意义,因为这是印度马鹿物种亚洲幸存者的最后也是唯一希望。为了利用微卫星标记来了解罕山鹿种群的组成性遗传特征,对栖息在达奇加姆国家公园及其周边的自由放养罕山鹿的野生种群进行了基因评估。

结果

在36个多位点基因型中,基于6个微卫星位点鉴定出30个独特个体。假设所有个体为同胞,估计的累积个体识别概率(PID sibs)为0.009(千分之九)。总共观察到49个不同的等位基因,平均(±标准误)等位基因数为8.17 ± 1.05,每个位点范围从5到11。观察到的杂合度在0.08至0.83之间,平均为0.40 ± 0.11,近交系数在 -0.04至0.87之间,平均为0.38 ± 0.15。发现大多数位点(5/6)具有信息性(PIC值> 0.5)。除Ca - 38外(P > 0.05),所有位点均偏离哈迪 - 温伯格平衡,除了Ca - 30和Ca - 43这一对位点外(P < 0.05),没有其他位点对显示出显著的连锁不平衡。

结论

初步研究结果表明,罕山鹿种群存在显著的近亲繁殖现象,与世界上其他鹿类种群相比,遗传多样性较低。我们建议优先考虑保留高杂合度的潜在个体进行迁地保护,并应启动覆盖整个分布范围的罕山鹿种群遗传监测,以确保罕山鹿的长期生存。我们进一步推测,忽视遗传特征可能会产生有害影响,这可能会对野生罕山鹿种群的繁殖适应性和生存能力产生负面影响。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f61/3751512/fd04861e5121/1756-0500-6-326-1.jpg

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