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KMID : 1005220160310010065
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Journal of Embryo Transfer
2016 Volume.31 No. 1 p.65 ~ p.72
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Effect of Mating Types on the Growth Traits of F2 Population between Landrace and the Jeju Native Black Pigs
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Kang Yong-Jun
Cho Sang-Rae
Jeong Dong-Kee
Lee Jae-Bong
Park Hee-Bok
Cho In-Cheol
Han Sang-Hyun
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Abstract
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This study was conducted to examine effects of mating type on the growth traits in an F2 population produced by reciprocal intercrosses between Landrace and the Jeju Native Black pig (JBP). The F2 progeny were produced by two different mating types based on the grand dams of founder breeds JBP (Cross_1) and Landrace (Cross_2). The body weights at 21 days after birth (BW21D) was significantly different between Cross_1 and Cross_2 (P<0.05), showing that the BW21D of Cross_1 has about 0.25 kg heavier than Cross_2. The significant differences were found between males and females for the growth traits including the body weights (BWB, BW21D, BW70D and BW140D) and average daily gains (ADG, eADG and lADG) (P<0.05). Males were heavier BWB, BW21D and BW140D levels, and higher ADG and lADG levels than females. On the other hand, females had heavier BW70D and higher eADG levels than those of males. When considering the mating types and sex simultaneously the Cross_2 males had the heaviest BW140D among the combinations of cross and sex. In conclusion, it is desirable to choose Landrace as grand dams in the reciprocal intercrosses between Landrace and JBP for producing their progeny construction and to plan the production of F2 males for industrial purposes. These results suggested that it may be one of useful strategies to improve the productivity through out selection of the mating type of founder breeds and the progeny sex, especially in Landrace, JBP and their related populations.
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KEYWORD
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grand dam , mating type , sex , Landrace , Jeju Native Black pig
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