Williams A R, Hupp H D, Thompson C E, Grimes L W
Virgin Islands Agricultural Experiment Station, Kingshill.
J Hered. 1988 Jan-Feb;79(1):9-13. doi: 10.1093/oxfordjournals.jhered.a110460.
Data were collected by the Virgin Islands Beef Cattle Improvement Program and the Virgin Islands Agricultural Experiment Station staff to establish the breed structure of the Senepol cattle. Data for the analysis were limited to the two Virgin Islands Senepol breeders with the most complete and largest set of records, representing approximately 65% of the entire Senepol population. Inbreeding (F) and coancestry relationship coefficients (rAB) and the theoretical inbreeding (FT) were determined from each data set and for the combined data from both farms, for each year, ranging from 1947 to 1984 for Annaly Farms, and from 1967 to 1984 for Castle Nugent Farm. The data sets for both farms were examined for the possibility of separation into families. Actual F within the Senepol population was relatively low, averaging less than 1.00%. Some separation into families occurred within Annaly Farms' cattle. The F and FT decreased (1.6 to 0.7% and 1.0 to 0.2%, respectively) as population numbers increased. The low F was accomplished through the breeding programs and exchanges of animals between farms on the island.
美属维尔京群岛肉牛改良计划和美属维尔京群岛农业试验站的工作人员收集了数据，以确定塞内波尔牛的品种结构。用于分析的数据仅限于美属维尔京群岛记录最完整、数量最多的两家塞内波尔牛养殖者，约占整个塞内波尔牛种群的65%。从每个数据集以及两个农场的合并数据中，确定了1947年至1984年安纳利农场以及1967年至1984年卡斯尔纽金特农场每年的近亲繁殖系数（F）、共同祖先关系系数（rAB）和理论近亲繁殖系数（FT）。对两个农场的数据集进行了检查，看是否有可能分成不同的家系。塞内波尔牛种群中的实际F值相对较低，平均低于1.00%。安纳利农场的牛群中出现了一些分成不同家系的情况。随着种群数量的增加，F和FT下降（分别从1.6%降至0.7%和从1.0%降至0.2%）。通过岛上各农场之间的育种计划和动物交换，实现了较低的F值。
