Article (Scientific journals)
Selective breeding of saline-tolerant striped catfish (Pangasianodon hypophthalmus) for sustainable catfish farming in climate vulnerable Mekong Delta, Vietnam
Dao Minh, H.; Duong Thuy, Y.; Pham Thanh, L. et al.
2022In Aquaculture Reports, 25
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Keywords :
Climatic change; Genetic adaptation; Heritability; Selection program; Striped catfish
Abstract :
[en] Striped catfish (Pangasianodon hypophthalmus), a freshwater species cultured mainly in the Mekong Delta region in Southern Vietnam, is facing a significant challenge due to salinity intrusion as a result of climatic changes. Given these evolving environmental conditions, selecting new strains with a higher salinity tolerance could make production of striped catfish economically feasible in brackish environments. In this study, we carried out a selection program aimed at developing a striped catfish strain able to survive and grow fast in a saline environment. To implement the selection program, we first collected males and females from different provinces in the Mekong delta. We next performed a factorial cross of these breeders to produce half- and full-sib families. When fish reached fry stage (47 dph), we put them in a saline environment (10 ppt) and subsequently kept 50 % of the fastest-growing fish after 143 days post hatching (dph). We repeated this mass selection procedure after 237 dph and 340 dph. We maintained in parallel a randomly selected group in saline conditions and a group of fish reared in freshwater to serve as controls. After crossing the selected individuals, we performed several tests on the next generation of fish to evaluate the effectiveness of selection after one generation in saline conditions. Average direct responses to selection were 18.0 % for growth and 11.4 % for survival rate after one generation of selection. We estimated a moderate realized heritability (0.29) for body weight. The genetic gains obtained in our study for body weight and survival rate after one generation of selection under saline conditions suggest that selection can be effective to improve ability of striped catfish to cope with saline stress. We conclude that our selection program has succeeded in developing a productive strain of striped catfish with better tolerance to salinity. © 2022 The Authors
Disciplines :
Animal production & animal husbandry
Author, co-author :
Dao Minh, H.;  FARAH/Sustainable Animal Production, Faculty of Veterinary Medicine, University of Liege (B43), Liege, 4000, Belgium, College of Aquaculture and Fisheries, Can Tho University, Viet Nam
Duong Thuy, Y.;  College of Aquaculture and Fisheries, Can Tho University, Viet Nam
Pham Thanh, L.;  College of Aquaculture and Fisheries, Can Tho University, Viet Nam
Bui Minh, T.;  College of Aquaculture and Fisheries, Can Tho University, Viet Nam
Vo Nam, S.;  College of Aquaculture and Fisheries, Can Tho University, Viet Nam
Do Thi Thanh, H.;  College of Aquaculture and Fisheries, Can Tho University, Viet Nam
Bui Thi Bich, H.;  College of Aquaculture and Fisheries, Can Tho University, Viet Nam
Nguyen Thi Ngoc, T.;  College of Aquaculture and Fisheries, Can Tho University, Viet Nam
Dang Quang, H.;  Research Unit in Environmental and Evolutionary Biology, Institute of Life, Earth & Environnment, University of Namur, rue de Bruxelles 61, Namur, B-5000, Belgium
Kestemont, Patrick;  UNamur - Université de Namur [BE] > URBE
Nguyen Thanh, P.;  College of Aquaculture and Fisheries, Can Tho University, Viet Nam
Farnir, Frédéric  ;  Université de Liège - ULiège > Département de gestion vétérinaire des Ressources Animales (DRA)
Language :
English
Title :
Selective breeding of saline-tolerant striped catfish (Pangasianodon hypophthalmus) for sustainable catfish farming in climate vulnerable Mekong Delta, Vietnam
Publication date :
2022
Journal title :
Aquaculture Reports
eISSN :
2352-5134
Publisher :
Elsevier B.V.
Volume :
25
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
This work was part of PANGAGEN project, supported by ARES-CCD (Académie de Recherche et d′Enseignement Supérieur – Commission de la Coopération au Développement) and funded by the Belgian Development Cooperation ( DRP/TPS 2017 ). We would like to thank the staff of Genomics Platform, GIGA, University of Liege for sequencing all DNA samples. We are also grateful to PANGAGEN team at Can Tho University and numerous volunteer students for their works in catching and sampling fish during the experiment.
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since 11 May 2023

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