The Research of Population Genetic Differentiation for Marine Fishes (Hyporthodus septemfasciatus) Based on Fluorescent AFLP Markers

Integrated View of Population Genetics Pub Date : 2018-11-05 DOI:10.5772/INTECHOPEN.81796

Yongshuang Xiao, Zhizhong Xiao, Jing Liu, D. Ma, Qinghua Liu, Jun Li

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Abstract

Hyporthodus septemfasciatus is a commercially important proliferation fish which is distributed in the coastal waters of Japan, Korea, and China. We used the fluorescent AFLP technique to check the genetic differentiations between broodstock and offspring populations. A total of 422 polymorphic bands (70.10%) were detected from the 602 amplified bands. A total of 308 polymorphic loci were checked for broodstock I ( P broodstock I = 55.50%) coupled with 356 and 294 for broodstock II ( P broodstock II = 63.12%) and offspring ( P offspring = 52.88%), respectively. The levels of population genetic diversities for broodstock were higher than those for offspring. Both AMOVA and F st analyses showed that significant genetic differentiation existed among populations, and limited fishery recruitment to the offspring was detected. STRUCTURE and PCoA analyses indicated that two management units existed and most offspring individuals (95.0%) only originated from 44.0% of the individuals of broodstock I, which may have negative effects on sustainable fry production.

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基于荧光AFLP标记的海洋鱼类群体遗传分化研究

九尾拟蚊是一种重要的商业繁殖鱼类，分布在日本、韩国和中国的沿海水域。采用荧光AFLP技术对亲鱼种群和子代种群的遗传差异进行了检测。在602条扩增条带中，共检测到422条多态性条带(70.10%)。亲鱼I (P亲鱼I = 55.50%)共检测到308个多态性位点，亲鱼II (P亲鱼II = 63.12%)和子代(P亲鱼II = 52.88%)分别检测到356个和294个多态性位点。亲鱼群体遗传多样性水平高于后代群体。AMOVA和F - 1分析均显示种群间存在显著的遗传分化，且对后代的渔业补充有限。结构分析和PCoA分析表明，1号亲鱼存在两个管理单元，大部分子代个体(95.0%)仅来自44.0%的个体，这可能对苗种的可持续生产产生不利影响。

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Integrated View of Population Genetics

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