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도창희 한국농업정보과학회 2000 농업정보과학 Vol.2 No.1
This paper sketches the strategies and systems for the knowledge-based information system of swine breeding that includes: the general strategies fer the implementation of the information system, the details of developed software for swine farms, the function and structure of the organizations in the system, and the future works for the information system for swine breeding. The software developed for the management of swine breeding farms is ready to seue as useful tool in the swine industry. The program is also an essential part of the information system, which provides the basic reports on the production of the farms and the func-tions for data transfer between the farms and the swine improvement organization. This research unines several aspects of the projects and future works. The final destiny of the systems in the research is the total solution service for swine breeders.
아비를 모르는 기록을 이용한 젖소 유전능력평가에서 정확도의 개선
도창희 한국동물자원과학회 2000 한국축산학회지 Vol.42 No.2
In the conventional genetic evaluation, the records without sire identification were discarded. Four alternative methods were examined accuracy of animal model genetic evaluations by including records lacking sire identification in the simulated data. The alternatives assumed that genetic values of sires missing sire identity were equivalent to population(method 1) and contemporary group(method 2) averages. The other two alternatives accounted genetic values of cows missing sire identity in the model with producing abilities of random (method 3) and fixed(method 4) effects. Discarding records without sire identity resulted poor estimation of contemporary group effects. Method 1 and 3 were uniformly more accurate in estimating cow and sire breeding values. And method 3 showed the greatest increase in accuracy.
The Outcomes of Selection in a Closed Herd on a Farm in Operation
도창희,양창범,최재관,김시동,양보석,박수봉,주영국,이석현 아세아·태평양축산학회 2015 Animal Bioscience Vol.28 No.9
A herd of Berkshire pigs was established in 2003 and subjected to selection without introduction of any genetic resources until 2007. The complete pedigree, including 410 boars and 916 sows, as well as the records from 5,845 pigs and 822 litters were used to investigate the results obtained from the selections. The index of selection for breeding values included days to 90 kg (D90kg), backfat thickness (BF) and number of piglets born alive (NBA). The average inbreeding coefficients of pigs were found to be 0.023, 0.008, 0.013, 0.025, 0.026, and 0.005 from 2003 to 2007, respectively. The genetic gains per year were 12.1 g, –0.04 mm, –3.13 days, and 0.181 head for average daily gain (ADG), BF, D90kg, and NBA, respectively. Breeding values of ADG, BF and D90kg were not significantly correlated with inbreeding coefficients of individuals, except for NBA (–0.21). The response per additional 1% of inbreeding was 0.0278 head reduction in NBA. The annual increase of inbreeding was 0.23% and the annual decrease in NBA due to inbreeding was 0.0064 head. This magnitude could be disregarded when compared with the annual gain in NBA (0.181 head). These results suggest that inbreeding and inbreeding depression on ordinary farms can be controlled with a proper breeding scheme and that breeding programs are economical and safe relative to the risks associated with importation of pigs.
유우의 부분기록에 대한 이용효율을 높이기 위한 회귀계수 추정
도창희,오봉국,이정구,이문연 ( C . H . Do,B . K . Ohh,J . K . Lee,M . Y . Lee ) 한국축산학회 1986 한국축산학회지 Vol.28 No.3
This study was carried out to estimate regression factors for extending partial records to 305-day records from data which were collected from 6 Holstein herds from 1969 through 1984. The records were pre-adjusted for the effect of herd, year, month of calving, and parity. The results obtained are as follows: 1. The best single month for estimating a complete lactation was the 5th or 6th months (R=0.87), while regression factors developed from sequential monthly records for extension were available over the first 5 monthly records (R=0.92-0.99). 2. Multiple regression factors by the use of each monthly record were more available over the fast 4 monthly records (R=0.91-1.00) and appeared to be substantially more precise than single monthly regression factors and cumulative monthly regression factors. 3. Regression equations including the last monthly record to estimate the remaining part were more available when the unknown part period was short.