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Title: Genetic parameters for growth and morphological traits of the Pacific white shrimp Penaeus vannamei from a selective breeding programme in the industrial sector of Ecuador
Authors: Shin,Hyun Suk 
Montachana Chimborazo, Magaly Elizabeth
Escobar Rivas, Jakie Melissa
Lorenzo Felipe,Alvaro 
Martínez Soler, Marina 
Zamorano Serrano, María Jesús 
Fernández Martín, Jesús
Ramírez Artiles, Juan Sebastián
Peñate Sánchez, Adrián 
Lorenzo Navarro, José Javier 
Intriago Díaz, Walter
Torres, Ricardo
Reyes Abad, Eduardo
Afonso López, Juan Manuel 
UNESCO Clasification: 2409 Genética
Keywords: Correlated Response
Genetic Parameters
Penaeus Vannamei
Issue Date: 2023
Journal: Aquaculture Reports 
Abstract: This study aimed to estimate the genetic parameters of growth-related traits (weight and length), morphological traits (cephalothorax, abdomen, length, height, segment width and volume), and the correlated response of weight traits via the selection for morphological traits to evaluate the relative efficiency of indirect selection in P. vannamei from a selective breeding growth programme, PMG-BIOGEMAR®, under industrial production conditions in Ecuador. A total of 595 shrimps from 89 full-sibling families were reared under an extensive culturing system (estuaries) (PRODUMAR, Duran, Ecuador), and were evaluated for genetic parameters at harvest size. The heritability of growth traits was moderate-medium (0.25–0.34), whereas it was quite variable for morphological traits (0.01–0.77). Among the morphological traits, Sixth Segment Width (SW6) (0.77) and Sixth Segment Volume (SV6) (0.35) had medium-high heritability, and genetic correlations between almost all morphological and growth traits were high and positive, except those corresponding to the fourth segment. According to these genetic parameters, SW6 and SV6 as the correlated response to weight are 9.7% and 5.8%, respectively, being more efficient than direct selection for weight. Thus, the sixth segment should be considered an indirect selection criterion for growth in future breeding programmes as it is a precise, non-invasive, and low-cost morphological trait for growth improvement in the industrial sector.
ISSN: 2352-5134
DOI: 10.1016/j.aqrep.2023.101649
Source: Aquaculture Reports[EISSN 2352-5134],v. 31, (Agosto 2023)
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