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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.
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.
젖소 유전능력평가에서 Contemporary Group 의 최적 , 최소 크기에 관한 연구
도창희 한국동물자원과학회 2000 한국축산학회지 Vol.42 No.2
Three, 6 and 9 of contemporary group sizes by five types including conventional genetic evaluation were examined with simulated data to study accuracy of estimation. Four alternatives were suggested. Method l and 2 assumed that genetic values of cows missing sire identity were population and contemporary group average. Method 3 and 4 accounted for genetic values through producing abilities estimated as random and fixed effects, respectively. Contemporary group effects were estimated more accurately as contemporary group size increased(3, 6 and 9), but breeding values were less increased in accuracy. Accuracies of alternative methods slightly exceeded those of conventional method for all estimated effects and all minimum group sizes. Method 3 had high increases in accuracy compared with the other alternatives. In the estimation of contemporary group effects, there were significant differences of increases in accuracy among the group sizes 3, 6 and 9. No significant differences in increases of accuracy in the estimation of cow and sire breeding values were shown among the group sizes.
도창희,박홍양,현재용 한국동물자원과학회 2002 한국축산학회지 Vol.44 No.4
본 연구는 1995년부터 2001년까지 한국종축개량협회가 전국 종돈장으로부터 수집한 Landrace, Yorkshire 및 Duroc의 등지방 두께, 일당증체량, 90㎏ 도달일령, 등심단면적, 정육률, 총산자수 및 복당생존자돈수에 대해 유전적 그룹을 통한 품종효과의 추정과 유전능력 평가를 위하여 96,842두의 산육능력성적과 90,396복의 산자능력자료를 분석하였다. 추정된 품종효과들은 각 품종의 특징을 보여주는데 Landrace는 등지방, 정육률 및 총산자수에서 우수하였고, Yorkshire는 정육률, 등심단면적, 총산자수 및 복당생존자돈수에서 좋은 결과를 보여주었으며, Duroc은 90㎏ 도달일령과 일당증체량에서는 우수하였지만 가식부위를 결정하는 등지방 두께와 정육률, 번시능력을 보여주는 산자수에서 다른 품종에 뒤지는 것으로 나타났다. 유전적 그룹을 통한 품종효과의 추정으로 품종별로 능력평가를 하는 노력을 절감할 수 있고 또한 F1 잡종돈이 포함되어도 평가할 수 있다. This study was carried out for the simultaneous genetic evaluation of swine breeds from the seedstock farms in Korea. The performance tasted production records of 96,842 heads and the litter records of 90,396 litters from 1995 to 2001 were analyzed to estimate the breeding values and the breed effects of days to 90㎏, daily gain, back fat thickness, loin muscle area, lean meat percent, total litter size and number born alive from Landrace, Yorkshire and Duroc. Estimated breed effects of traits had shown the characteristics of the breeds. Landrace was superior in back fat thickness and lean meat percent to other breeds. Yorkshire had shown good performance in lean meat percent, loin muscle area, total litter size and number born alive. Duroc was superior to the other breeds in days to 90㎏ and daily gain. Conclusively, the multi-breed genetic evaluation would result in higher connectedness and provide convenience for the routine genetic evaluation process of swine performance and reproduction test.