Heritability for growth traits in giant freshwater prawn,Macrobrachium rosenbergii (de Mann 1879) based on best linear unbiased prediction methodology |
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| Authors: | Nissara Kitcharoen Wikrom Rungsin Skorn Koonawootrittriron Uthairat Na‐Nakorn |
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| Affiliation: | 1. Department of Aquaculture, Graduate School, Kasetsart University, Bangkok, Thailand;2. Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, Thailand;3. Department of Animal Science, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand;4. Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, Thailand |
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| Abstract: | In this study, heritability was estimated for growth‐related traits of giant freshwater prawn (Macrobrachium rosenbergii) before and after morphological sexual differentiation. Estimation was made on data from 16 full‐sib and eight half‐sib families. The variance estimation was performed using a univariate mixed linear animal model and variance components were analysed following an animal model using restricted maximum likelihood procedure using average information algorithm. Heritability estimates (h2) varied considerably with ages. At 2 months old, h2for carapace length (CL; 0.35±0.15) and body weight (BW; 0.26±0.13) were higher than those estimated at 5 months old, based on mixed sex data. However, when data were sorted by sex, h2 calculated from data of females were higher than those of males for CL (0.26±0.16 vs. 0.10±0.06), BW (0.28±0.17 vs. 0.12±0.08), body length (0.40±0.17 vs. 0.11±0.07), total length (0.47±0.18 vs. 0.11±0.07) and claw length (0.29±0.16 vs. 0.03±0.04). The same trend was observed for traits at 6 months old in both bulk and individual rearing. |
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| Keywords: | heritability growth
Macrobrachium rosenbergii
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