Inbreeding and effective population size in the Malaysian nucleus of the GIFT strain of Nile tilapia (Oreochromis niloticus)

R W Ponzoni; H L Khaw; Nguyen Hong Nguyen; A Hamzah

doi:10.1016/j.aquaculture.2010.02.009

Back

Inbreeding and effective population size in the Malaysian nucleus of the GIFT strain of Nile tilapia (Oreochromis niloticus)

Journal article

Peer reviewed

Inbreeding and effective population size in the Malaysian nucleus of the GIFT strain of Nile tilapia (Oreochromis niloticus)

R W Ponzoni, H L Khaw, Nguyen Hong Nguyen and A Hamzah

Aquaculture, Vol.302(1-2), pp.42-48

2010

DOI: https://doi.org/10.1016/j.aquaculture.2010.02.009

Files and links (1)

url

https://doi.org/10.1016/j.aquaculture.2010.02.009View

Published Version

Abstract

nile tilapia

oreochromis niloticus

pedigree

inbreeding

effective population size

A fully pedigreed population of the GIFT (Genetically Improved Farmed Tilapia) strain of Nile tilapia (Oreochromis niloticus) was established in Malaysia during 2001 and 2002. The selection program was focused on the improvement of growth rate to harvest weight and the mate allocation strategy was aimed at avoiding inbreeding and ensuring that most sire families were represented as parents of the next generation. We examined the build up of inbreeding and we estimated the effective population size by different methods (namely, from: the number of selected parents, the variance in family size, the inbreeding coefficient, and the co-ancestry among selected individuals). The rate of inbreeding was 0.0037 per generation and the effective population size calculated from the rate of increase in the co-ancestry was 88. We conclude that the mate allocation strategy has been successful in containing inbreeding and that the effective population size is satisfactory for the sustainability of the selection program. By contrast, the effective population size is below the minimum (e.g. 500) necessary for the retention of evolutionary potential, hence the population would be unlikely to adapt and cope with severe environmental challenges. The results are discussed in relation to the development and maintenance of selection lines in farmed aquatic animals.

Details

Title: Inbreeding and effective population size in the Malaysian nucleus of the GIFT strain of Nile tilapia (Oreochromis niloticus)
Authors: R W Ponzoni (Author) - WorldFish Center, Malaysia
H L Khaw (Author) - WorldFish Center, Malaysia
Nguyen Hong Nguyen (Author) - WorldFish Center, Malaysia
A Hamzah (Author) - National Prawn Fry Production & Research Center, Malaysia
Publication details: Aquaculture, Vol.302(1-2), pp.42-48
Publisher: Elsevier BV
Date published: 2010
DOI: 10.1016/j.aquaculture.2010.02.009
ISSN: 0044-8486
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering; Centre for Bioinnovation
Language: English
Record Identifier: 99450403002621
Output Type: Journal article

Metrics

1 File views/ downloads

533 Record Views

81 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Web Of Science research areas: Fisheries; Marine & Freshwater Biology