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首页> 外文期刊>Journal of Agriculture of the University of Puerto Rico >Correlation of hair length and width with genetic potential for productive traits in Puerto Rican Holstein cattle1
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Correlation of hair length and width with genetic potential for productive traits in Puerto Rican Holstein cattle1

机译：波多黎各荷斯坦牛的毛发长度和宽度与生产性状的遗传潜力的相关性1

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摘要

To demonstrate that the Holstein cow population of Puerto Rico presents differences in hair coat characteristics, hair samples were obtained from the rump, ribs and shoulder of cows visually characterized either as short (SH) or normal haired (NH). Hair length and width were measured and correlated with the genetic potential of cows for these traits: duration of productive life, dairy conformation, pregnancy rate, milk production, milk fat, and somatic cell count (SCC). The cows phenotypically identified as SH had shorter but wider hairs than NH cows. Length of hair from the rump and ribs was inversely correlated with productive life duration and directly correlated with SCC. In addition, width of the rump and rib hair was directly correlated with milk production but inversely correlated with productive life. This variability in hair coat length and width of Holstein cattle in Puerto Rico may affect productive traits. Identification of Holstein cattle with SH phenotype should continue, thus to facilitate further genetic evaluation of this trait with the goal of improving efficiency of the local dairy industry.
机译：为了证明波多黎各的荷斯坦奶牛种群在毛发特征上存在差异，从可视化为短毛（SH）或正常毛发（NH）的母牛的臀部，肋骨和肩部获取了毛发样本。测量了头发的长度和宽度，并与这些特征的母牛的遗传潜力相关：生产寿命，乳品构象，怀孕率，产奶量，乳脂和体细胞计数（SCC）。在表型上被鉴定为SH的奶牛比NH奶牛短而宽。臀部和肋骨的头发长度与生产寿命成反比，与SCC直接成正比。此外，臀部和肋骨的宽度与产奶量直接相关，但与生产寿命成反比。波多黎各的荷斯坦牛的毛大衣长度和宽度的这种变化可能会影响生产性状。应继续鉴定具有SH表型的荷斯坦牛，从而促进对该性状的进一步遗传评估，以提高当地乳制品业的效率为目标。

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