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

Abstract

The objective of this study was to investigate the effect of inbreeding on body weight (BW) at harvest size (130 d of age) and grow-out survival rate (SR) (65-130 d of age) in a nucleus breeding population of Penaeus (Litopenaeus) vannamei. An experiment was designed to generate inbred families the product of sibling matings, as well as groups of families with different inbreeding coefficients in three successive generations. The families came from a broodstock line selected for growth and survival. Inbreeding coefficients varied between 0 and 60.4%. A total of 16,361 shrimp from 320 families were produced. Data were analyzed using mixed linear model methodology and restricted maximum likelihood methods. Estimated change on BW 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 g). Regression coefficient for grow-out SR on inbreeding was not significant. Estimated change in SR 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%). It is important to control inbreeding level in breeding programs.

Effects of Inbreeding on Genetic Characteristic, Growth, Survival Rates, and Immune Responses of a New Inbred Line of Exopalaemon carinicauda

“…This study found that inbreeding had a significant negative effect on body weight and body length at harvest size (120 days of age) with an estimated effect on inbreeding coefficient. This is consistent to the estimated by Ríos-Pérez et al who found that inbreeding had a significant negative effect on the body weight at the age of 130-day stage in Penaeus (Litopenaeus) vannamei [19]. Significant inbreeding depression was found at all the inbreeding levels studied (80, 100, and 140 days), the inbreeding depression in the body weight at the 140- 7 International Journal of Genomics day stage was found to be -10.4% at F = 0:25, -16.61% at F = 0:375, and -23.68% at F = 0:50, and an increasing inbreeding depression of growth was observed with increasing inbreeding coefficient at 140-day stage in Fenneropenaeus chinensis [24].…”

“…Inbreeding depression for different components of fitness was occurred in animals and plants, such as fertility [43], hatchability [44], body weight [45], and survival [46]. Studies about the inbreeding depression of aquaculture species are of general concern, including Litopenaeus vannamei [19,23,47], Eulimnadia Texana [48], Penaeus (marsupenaeus) japonicas [25], Fenneropenaeus chinensis [24], and Portunus trituberculatus [20,49,50].…”

“…Not all species showed inbreeding depression for all characters, but almost all showed inbreeding depression for most characters [17]. Inbreeding depression has been reported for many different traits, including growth [18], survival [19], stress resistance [20], and reproductive traits [21,22]. The magnitude of inbreeding depression on the fundamental economic traits may vary from species to species, also including aquaculture species.…”

Heritability and genetic correlations for infectious hypodermal and hematopoietic necrosis virus load, body weight at harvest, and survival rate in Pacific white shrimp (Litopenaeus vannamei)

“…The heritability for SU in the observed scale was lower (0.02) than previous estimates obtained for another shrimp population (0.04–0.10) (Gitterle, Rye, et al, ), and it lies between a previous estimate for this population (0.04), reported by Campos‐Montes et al (), and that (0.01) of another population from the same hatchery (De Los Ríos‐Pérez, Campos‐Montes, Martínez‐Ortega, Castillo‐Juárez, & Montaldo, ).…”

Meta‐analysis of genetic parameters of production traits in cultured shrimp species

“…ble differences in additive genetic variance of body weight between morphotypes of giant freshwater shrimp Hung, Nguyen, Hurwood, and Mather (2014). also reported morphotypes, and reproductive status of giant freshwater prawn had significant effects on estimates of genetic parameters of body weight Ellen et al (2014). reported a low-to-moderate heritability of between 0.1 and 0.4 for social interaction traits in farmed animals, suggesting possibilities of selecting these traits for better growth and survival.…”