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- W2314992296 abstract "Pedigree records were studied for 350 calves born from 1906 to 1947 in the purebred Aberdeen-Angus herd at the Agricultural and Mechanical College of Texas. In this herd where an attempt was made to keep inbreeding to a minimum, the average inbreeding coefficient was 2.14%. Since practically all the female replacements descended from one particular cow, the average yearly inter se relationship among the heifer/ calves was 0.27, although two or more bulls were used during 15 of the 41 years. The 282 calving intervals averaged 424 days with a standard deviation of 123 days. Repeatability of calving interval was estimated to be 0.20. The estimate of correlation between the age of the dam (in months) when her first calf was born and her average calving interval was 0.29. The estimate of correlation between the chronological day of the year on which the calf was born and the length of time it was carried in utero was −.37. Heritability estimates of gestation length obtained by quadrupling the paternal half-sib correlation, quadrupling the maternal half-sib correlation and doubling the full-sib correlation were all approximately 0.50. Repeatability of gestation length was estimated to be 0.18." @default.
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- W2314992296 date "1959-05-01" @default.
- W2314992296 modified "2023-09-26" @default.
- W2314992296 title "A Statistical Study of Relationship, Inbreeding, Gestation Length, and Calving Interval in a Herd of Aberdeen-Angus Cattle" @default.
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- W2314992296 doi "https://doi.org/10.2527/jas1959.182820x" @default.
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