Establishment of DLD landrace swine: 8. Productivity and estimated breeding value of imported landrace sows from Norway
1999
Supawan Bunlengthong(Department of Livestock Development, Bangkok (Thailand). Animal Husbandry Division. Small Animal Section) | Pakorn Bhuprasert(Department of Livestock Development, Bangkok (Thailand). Animal Husbandry Division. Chiang Mai Livestock Research and Breeding Center) | Prapas Mahinchai(Department of Livestock Development, Bangkok (Thailand). Animal Husbandry Division. Chiang Mai Livestock Research and Breeding Center)
Study on productivity of three hundred forty litters of Norwegian's Landrace sows raising at Chiang Mai Livestock Research and Breeding Center during period of 1994-1998. Least Square means of ages at first service (AFS), service per conception (SPC), litter size at birth (LSB), litter size born alive (LSBA), litter size at 3 weeks (LS3), litter size at 4 weeks (LS4), litter weight at birth (LWB), litter weight at 3 weeks (LW3), litter weight at 4 weeks (LW4) and rate of survival at 4 weeks (RS4) were 282.47+-49.23 days, 1.37+-0.67 time, 11.67+-3.48, 9.75+-3.22, 8.18+-3.17, 8.06+-3.16 pig/litter, 16.10+-4.94, 47.59+-18.32, 60.00+-22.75 kg/litter, and 83.62+-21.52 percent, respectively. The effects of fixed effects were parity and year-season, parity affected on almost traits excepted RS4, year-season affected on service per conception, LW4 and RS4 (p LT 0.05). Heritabilities of service per conception, LSB, LSBA, LS3, LS4, LWB, LW3, LW4, and RS4 were 0.016, 0.099, 0.043, 0.053, 0.045, 0.047, 0.030, 0.047 and 0.010, respectively. Regression equation and genetics trend can be calculated from estimated breeding value. Genetics trend of LSB, LSBA, LS3, LS4, LWB, LW3, LW4 and RS4 increased 0.098, 0.045, 0.053, 0.044 pig/litter, 0.069, 0.169, 0.315 kg/litter, and 0.018 percent, respectively and service per conception decreased 0.004 time.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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