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KMID : 0613820170270030295
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Journal of Life Science
2017 Volume.27 No. 3 p.295 ~ p.300
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Association between IDH3B Genotypes and Economic Traits in a Crossbred F2 Population between Duroc and Jeju Native Black Pigs
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Park Hee-Bok
Han Sang-Hyun
Kang Yong-Jun
Shin Moon-Cheol
Lee Jae-Bong
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Abstract
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This study examined the association between genotypes of the isocitrate dehydrogenase 3, beta subunit (IDH3B) gene and economic traits in an F2 population of Duroc and Jeju (South Korea) native black pigs (JBPs). The genotypes was determined the presence/absence of a 304-bp insertion/deletion fragment in the promoter region of the IDH3B gene for JBP, Duroc, and their F1 and F2 progeny. Three genotypes (AA, AB and BB) were found in the F1 and F2 populations, but there was no AA genotype found in JBP and no BB in Duroc. Association analysis results showed the significant differences with carcass weights (CW), backfat thicknesses (BFT) and eye muscle area (EMA) (p<0.05), but not with growth traits including body weights and average daily gains at different stages, reproductive traits including teat numbers, and crude fat contents (CFAT) measured in longissimus dorsi (p>0.05). The F2 pigs possessing the IDH3B BB homozygote had heavier CW (72.92±11.133 kg), thicker BFT (25.75±6.06 mm), and larger EMA (23.82±4.825 cm2) than those from the other genotypes (p<0.05). These results were estimated that there are biological roles related with IDH3B genotypes resulting development of EMA, BFT, and CW but not with intramuscular fat deposition during late period of pig production. Our findings suggest that the 304-bp insertion allele of porcine IDH3B may be a genetic marker for marker assistant selection for improving meat productivity of the Jeju Black pig and Duroc-related molecular breeding systems.
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KEYWORD
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Association, Duroc, economic trait, IDH3B, Jeju Native Black pig
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