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February 24, 2015

Mexico

Inbreeding Research on Penaeus (Litopenaeus) vannamei

 

From Abstract: The objective of this study was to investigate the effect of inbreeding on body weight and survival in a nucleus breeding population of Penaeus (Litopenaeus) vannamei.  An experiment was designed to generate inbred families from sibling matings and groups of families with different inbreeding coefficients from three successive generations.  The families came from a broodstock line selected for growth and survival.  Inbreeding coefficients varied from 0 to 60.4%.  A total of 16,361 shrimp from 320 families were produced.  Estimated change on body weight per 10% increase on the inbreeding coefficient was −2.19 ± 0.41% (P <0.001) relative to the mean of non-inbred shrimp predicted from the model (19.63 grams).  Regression coefficient for growout survival on inbreeding was not significant.  Estimated change in survival per 10% increase on the inbreeding coefficient was −0.009 ± 0.006% (P = 0.108) relative to the mean of non-inbred shrimp predicted from the model (81.72%).  The researchers concluded that it was important to control inbreeding in breeding programs.

 

Source: Journal of the World Aquaculture Society.  Inbreeding Effects on Body Weight at Harvest Size and Grow-out Survival Rate in a Genetic Selected Population of Pacific White Shrimp Penaeus (Litopenaeus) vannamei.  Lidia de los Ríos-Pérez, Gabriel R. Campos-Montes, Alfonso Martínez-Ortega, Héctor Castillo-Juárez and Hugo H. Montaldo (email montaldo@unam.mx, Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana, Unidad Xochimilco, 04960 Coyoacán, D.F., Mexico).  Volume-46, Issue-1, Pages 53-60, February 2015 (Article First Published Online February 23, 2015).

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