Soliman Taha, Aly Walid, Fahim Reda M, Berumen Michael L, Jenke-Kodama Holger, Bernardi Giacomo
Okinawa Institute of Science and Technology Graduate University (OIST) 1919-1 Tancha, Onna-son Kunigami-gun Okinawa Japan.
National Institute of Oceanography and Fisheries Cairo Egypt.
Ecol Evol. 2017 Nov 15;7(24):11092-11099. doi: 10.1002/ece3.3586. eCollection 2017 Dec.
Recently, tilapia have become increasingly important in aquaculture and fisheries worldwide. They are one of the major protein sources in many African countries and are helping to combat malnutrition. Therefore, maintenance and conservation genetics of wild populations of tilapia are of great significance. In this study, we report the population genetic structure and genetic diversity of the redbelly tilapia () in three different Egyptian aquatic environments: brackish (Lake Idku), marine (Al-Max Bay), and freshwater (Lake Nasser). The habitat differences, environmental factors, and harvesting pressures are the main characteristics of the sampling sites. Three mitochondrial DNA markers (COI: cytochrome oxidase subunit I; the D-loop; CYTB: cytochrome b) were used to assess population structure differences among the three populations. The population at Lake Nasser presented the highest genetic diversity ( = 0.8116, =6), and the marine population of Al-Max Bay the lowest ( = 0.2391, = 4) of the combined sequences. In addition, the phylogenetic haplotype network showed private haplotypes in each environmental habitat. Results presented here will be useful in aquaculture to introduce the appropriate broodstock for future aquaculture strategies of . In addition, evidence of population structure may contribute to the management of tilapia fisheries in Egyptian waters.
最近，罗非鱼在全球水产养殖和渔业中变得越来越重要。它们是许多非洲国家的主要蛋白质来源之一，有助于对抗营养不良。因此，罗非鱼野生种群的维持和保护遗传学具有重要意义。在本研究中，我们报告了三种不同埃及水生环境中红腹罗非鱼（）的种群遗传结构和遗传多样性：咸淡水（伊德库湖）、海洋（马克斯湾）和淡水（纳赛尔湖）。栖息地差异、环境因素和捕捞压力是采样地点的主要特征。使用三个线粒体DNA标记（COI：细胞色素氧化酶亚基I；D环；CYTB：细胞色素b）来评估三个种群之间的种群结构差异。纳赛尔湖的种群呈现出最高的遗传多样性（ = 0.8116， = 6），而马克斯湾的海洋种群在合并序列中遗传多样性最低（ = 0.2391， = 4）。此外，系统发育单倍型网络显示每个环境栖息地都有特有单倍型。此处呈现的结果将有助于水产养殖，为未来罗非鱼的水产养殖策略引入合适的亲鱼。此外，种群结构的证据可能有助于埃及水域罗非鱼渔业的管理。
