Heritability genetic line and inbreeding effects on resistance of whiteleg shrimp Penaeus vannamei Boone 1931 to acute hepatopancreatic necrosis disease (AHPND) in Mexico

Castillo-Juárez H., . and Betancourt-Lozano M., . and Gómez-Gil B., . and Gallaga-Maldonado E. P., . and Soto-Rodríguez S. A., . and Campos-Montes G. R., . and Montaldo H. H., . and Caballerozamora A., . and Martínez-Ortega A., . and Lozano-Olvera R., . and Quintana-Casares J. C., . Heritability genetic line and inbreeding effects on resistance of whiteleg shrimp Penaeus vannamei Boone 1931 to acute hepatopancreatic necrosis disease (AHPND) in Mexico. pp. 88-101. ISSN 0116-6514

The objective of this paper is to present preliminary results regarding heritability genetic line differences and inbreeding effects for survival time in experimental challenges to acute hepatopancreatic necrosis disease (AHPND) in Penaeus vannamei Boone 1931. Here we present results of analyses conducted on data from a Resistance Line obtained from a merging of several Ecuadorian groups with a history of white-spot syndrome virus resistance and a Growth Line with high genetic growth ability obtained by selection in a Mexican hatchery. Family-identified animals from the two genetic lines and their crosses were inoculated by immersion in 2014 2015 and 2016 using a Vibrio parahaemolyticus strain (M0904) AHPND obtained from a natural infection in Mexico. Heritabilities for survival time obtained using nested linear mixed models ranged from 9 to 18 . Survival was greater for the Resistance Line compared to the Growth Line or the F1 cross (P 0.02). Our results point to the presence of additive genetic variation in both lines evaluated that may be exploited in breeding programmes to increase AHPND resistance. Additionally our results support the idea that the Resistance Line is more resistant to AHPND than the Growth Line. Finally comparisons between inbred and non-inbred animals suggest that the effect of inbreeding on AHPND resistance is small.

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Abstract

The objective of this paper is to present preliminary results regarding heritability genetic line differences and inbreeding effects for survival time in experimental challenges to acute hepatopancreatic necrosis disease (AHPND) in Penaeus vannamei Boone 1931. Here we present results of analyses conducted on data from a Resistance Line obtained from a merging of several Ecuadorian groups with a history of white-spot syndrome virus resistance and a Growth Line with high genetic growth ability obtained by selection in a Mexican hatchery. Family-identified animals from the two genetic lines and their crosses were inoculated by immersion in 2014 2015 and 2016 using a Vibrio parahaemolyticus strain (M0904) AHPND obtained from a natural infection in Mexico. Heritabilities for survival time obtained using nested linear mixed models ranged from 9 to 18 . Survival was greater for the Resistance Line compared to the Growth Line or the F1 cross (P 0.02). Our results point to the presence of additive genetic variation in both lines evaluated that may be exploited in breeding programmes to increase AHPND resistance. Additionally our results support the idea that the Resistance Line is more resistant to AHPND than the Growth Line. Finally comparisons between inbred and non-inbred animals suggest that the effect of inbreeding on AHPND resistance is small.

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Item Type:	Article
AGROVOC Term:	Penaeus
AGROVOC Term:	Penaeus vannamei
AGROVOC Term:	Aquatic organisms
AGROVOC Term:	Evaluation
AGROVOC Term:	Inoculation
AGROVOC Term:	Vibrio parahaemolyticus
AGROVOC Term:	Bacterial diseases
AGROVOC Term:	Heritability
AGROVOC Term:	Heredity
AGROVOC Term:	Inbreeding
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/7976

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