Open AccessDistribution of the 1/29 translocation in the A.I. bull population of Swedish Red and White cattle
Author(s) -
GUSTAVSSON INGEMAR
Publication year - 1971
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1971.tb02422.x
Subject(s) - biology , white (mutation) , chromosomal translocation , distribution (mathematics) , population , genetics , demography , mathematics , gene , sociology , mathematical analysis
Chromosome studies of the whole SRB (Swedish Red and White) bull population used for artificial insemination (A. I.) in Sweden revealed the occurrence of the 1/29‐translocation in the heterozygous stage in approximately 12% and in the homozygous stage in 0.42% of a total of 944 bulls. The incidences agreed well with those found in 1964–1965 in 246 bulls sampled at random from the A. I. bull population. There were no deviations from the incidences expected according to the Hardy‐Weinberg law and no differences in incidence between A. I. associations. The small deviations related to age were most probably ascribable to extensive use of single sires carrying the translocation. The latter fact was demonstrated in the pedigree studies. Most translocation bulls were sons of a small group of sires earlier found to be carriers or presumed to be carriers of the translocation. No deviations from the 1: 1 segregation ratio were observed in the son groups of heterozygous sires and in no case could a non‐hereditary pattern of the translocation be established.