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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Genetic Diversity of Feral Populations of Nile Tilapia (Oreochromis niloticus) in Thailand and Evidence of Genetic Introgression) ผู้เขียน: ศรีจรรยา สุขมโนมนต์, Wansuk Senanan, Anne R. Kapuscinski,  ดร.อุทัยรัตน์ ณ นคร, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe study aimed to understand the genetic diversity of Thai feral populations of Nile tilapia, Oreochromis niloticus, which make a substantial contribution to freshwater fi sh production in the country. The possible introgression from other tilapia populations/species was also investigated. Fourteen microsatellite primers were used to study three feral O. niloticus populations collected from reservoirs representing three types of habitats: 1) a wet-land (Sam Roi Yot, ON-SY); 2) a small reservoir (Bang Phra reservoir, ON-BP); and 3) a large reservoir (Bueng Boraphet, ON-BB). The results showed genetic variation that was high in ON-BP (Ar = 7.99, He = 0.75) and relatively low in ON-BB (Ar = 5.71, He = 0.62) and ON-SY (Ar = 5.78, He = 0.71). Genetic data were imported from two reference populations of O. niloticus [one population each from the Chitralada Villa Royal Residence, Thailand (ON-CD) and the genetically improved GIFT strain (ON-GIFT)] and one O. mossambicus population from South Africa for the model-based clustering analyses. ON-CD contributed to substantial portions of the gene pool of the feral populations. Genetic differentiation among the feral populations was signifi cant (P < 0.017, Bonferroni corrected). Introgression at the intraspecifi c level (from ON-GIFT to ON-BP and ON-BB) was observed while interspecifi c introgression between O. niloticus and O. mossambicus was apparent in ON-SY. |
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