St'avíková M, Lojda L, Polácek J
Vet Med (Praha). 1980 Mar;25(3):129-37.
A characteristic effect of bulls on the distribution of rudimentary teats in their daughters was demonstrated by the study of the influence of the genotype on the location of extra teats. The comparison of the mother--daughter pairs showed that the concordance of location of a single teat either on the right or on the left between the mother and daughter was found in 86.40% of all cases, whereas discordance was found just in 13.60% of the examined pairs. Concordance in the distance of rudimentary teats in a caudal direction from the rear teat was observed in 61.00% of the cases and discordance in 39.00% of the pairs. In 16 pairs of dizygotic twins, a congruence was also found in the majority of cases between the sibs as well as between the heifers and their mothers. In the whole set of cows under study, rudimentary teats located caudally represented 87.88% of all extra teats, small teats between the normal fore and rear teats represented 2.74%, rudimentary teats at the rear teats 9.03% and those at the fore teats 0.35%.
通过对基因型对额外乳头位置影响的研究，证明了公牛对其女儿乳腺原基分布的特征性影响。母女对的比较表明，在所有情况中，86.40% 的母女对中单个乳头在右侧或左侧的位置一致，而在所检查的配对中，不一致的情况仅占13.60%。在61.00% 的情况下，观察到乳腺原基从后乳头向尾侧的距离一致，39.00% 的配对中存在不一致。在16对异卵双胞胎中，大多数情况下，同胞之间以及小母牛与其母亲之间也发现了一致性。在整个研究的奶牛群体中，尾侧的乳腺原基占所有额外乳头的87.88%，正常前后乳头之间的小乳头占2.74%，后乳头处的乳腺原基占9.03%，前乳头处的占0.35%。
