Genetic diversity and heritability of economically important traits in captive Australasian snapper (Chrysophrys auratus)
| Autor: | David T. Ashton, Peter A. Ritchie, Maren Wellenreuther, Elena Hilario, Peter Jaksons |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
education.field_of_study Genetic diversity biology business.industry Population Zoology 04 agricultural and veterinary sciences Aquatic Science Heritability biology.organism_classification Chrysophrys auratus 03 medical and health sciences Aquaculture 040102 fisheries Trait 0401 agriculture forestry and fisheries education business Inbreeding Selection (genetic algorithm) 030304 developmental biology |
| Zdroj: | Aquaculture. 505:190-198 |
| ISSN: | 0044-8486 |
| DOI: | 10.1016/j.aquaculture.2019.02.034 |
| Popis: | Aquaculture is the fastest growing animal production sector in New Zealand but low species diversity is a barrier to long-term growth. Snapper (Chrysophrys auratus) has been identified as a promising candidate for aquaculture development and an initial population has been established at the New Zealand Institute for Plant & Food Research Limited. The aim of the present study was to combine high-throughput Genotyping by Sequencing (GBS) and trait data from this population to reconstruct the pedigree, measure the degree of inbreeding across generations, and determine the heritability of 11 traits of interest within the breeding programme, in particular growth-related traits. Likelihood of parentage values showed that the pedigree consisted of a complex mixture of full- and half-sib individuals, with skewed contributions across parents. Average inbreeding did not change significantly between generations, but dramatic inbreeding differences were detected between F2 descendants from the two independent starting (F0) cohorts and between F2 offspring from either full-sib, half-sib, or unrelated F1 parents. Trait heritability ranged from 0.03 to 0.63, with growth related traits being situated around 0.27 and 0.10 in the first and third year, respectively. These results suggest that selection for higher growth could result in 4.6–15.7% and 1.4–4.9% improvement per generation, in the first and third years, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect