Open AccessHeritability and genetic correlations for infectious hypodermal and hematopoietic necrosis virus load, body weight at harvest, and survival rate in Pacific white shrimp ( Litopenaeus vannamei )
Author(s) -
HernándezRuíz Hortencia,
Montaldo Hugo H.,
BustosMartínez Jaime,
CamposMontes Gabriel R.,
CastilloJuárez Héctor
Publication year - 2020
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/jwas.12664
Subject(s) - shrimp , biology , litopenaeus , heritability , genetic correlation , zoology , genetic variation , penaeus , selection (genetic algorithm) , viral load , population , virus , veterinary medicine , genetics , fishery , gene , demography , medicine , artificial intelligence , computer science , sociology
Heritability and genetic correlations for body weight at harvest size (BW), grow‐out survival (SU), and log‐transformed infectious hypodermal and hematopoietic necrosis virus (IHHNV) load (VL ln ) in Litopenaeus vannamei were estimated. Data were obtained in 2012 from a shrimp breeding population in Mexico using 12,440 shrimp for BW and 16,814 shrimp for SU, and quantitative polymerase chain reaction determinations from 160 full‐sib families were obtained for VL ln . DNA was extracted from pooled muscle samples of six shrimp per family for a total of 960 individuals. Heritability estimates for BW, SU, and VL ln at the family mean and at individual levels were 0.24 ± 0.08, 0.02 ± 0.01, 0.42 ± 0.45, and 0.08 ± 0.11, respectively. Genetic correlation estimates of BW with SU, BW with VL ln , and VL ln with SU were 0.40, −0.04, and −0.57, respectively. Our results suggest that VL ln has genetic variation and a favorable genetic association with BW and SU. No serious drawbacks were found from selection responses estimated using single‐trait and multitrait indices to increase BW and SU and decrease VL ln . Favorable correlated responses for IHHNV tolerance estimated as BW/VL ln and SU/VL ln were also found. This study offers new insights into the possibility of using IHHNV viral load as a possible selection criterion in L. vannamei breeding programs.