Índices de selección para la mejora genética de vacas Siboney de Cuba

Archivos de Zootecnia Pub Date : 2020-01-15 DOI:10.21071/az.v69i265.5038

A. Hernández, R. P. D. León

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Abstract

Phenotypic and genealogy date of Siboney de Cuba cows from 1984 to 2016 calving years was used. The goal of this study was to estimate the parameters and breeding values (VG) of production, reproduction and longevity traits. Besides to construct selection index (IS) using principal componente (CP) analysis. The VG of 6 425 cows were estimated for milk yield up to 305 days (VGL305), lactation length (VGDL), age at first calving (VGEP1), calving gestation interval (VGIPG), lifetime yields (VGLTV) y productive life (VGVP). The heredabilities for L305, DL, EP1, IPG, LTV y VP were of 0.16±0.01, 0.04±0.01, 0.04±0.01, 0.44±0.02, 0.05±0.01 y 0.01±0.01, respectively. The genetic correlation between L305 and DL was of 0.36, between EP1, IPG and LTV of 0.36, -0.42 and -0.36, and the VP with the others traits were low (-0.24 to 0.11). The 70.8 % of the total variance of VG was explained for the CP1-3, doing the highest importance the CP1 (32.4 %). Using CP, it is possible to select animals based on only two scores generated by PC1 and PC2 instead of the six VG. It was concluded that it is possible to construct IS based on CP in Siboney de Cuba bovine. Selection for VGL305 and VGDL with PC1 index could be done separately from selection for VGIPG, VGEP1 and VGLTV using PC2 index, and the VP could be improved independent of the other traits using their VG.

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古巴西博尼奶牛遗传改良的选择指标

使用了1984年至2016年古巴西博尼奶牛产仔年份的表型和系谱数据。本研究的目的是估计生产、繁殖和寿命性状的参数和育种值。此外，利用主成分分析法构建选择指数。对6 425头奶牛的VG进行了长达305天的产奶量（VGL305）、泌乳期（VGDL）、首次产仔年龄（VGEP1）、产仔妊娠间隔（VGIPG）、寿命产量（VGLTV）和生产寿命（VGVP）的估计。L305、DL、EP1、IPG、LTV和VP的可遗传性分别为0.16±0.01、0.04±0.01、0.044±0.02、0.05±0.01和0.01±0.01。L305与DL的遗传相关性为0.36，EP1、IPG与LTV的遗传相关性分别为0.36、-0.42和-0.36，VP与其他性状的遗传相关性较低（-0.24-0.11）。使用CP，可以仅根据PC1和PC2产生的两个分数而不是六个VG来选择动物。因此，可以在Sibony-de Cuba牛中构建基于CP的is。利用PC1指数对VGL305和VGDL的选择可以与利用PC2指数对VGIPG、VGEP1和VGLTV的选择分开进行，并且利用它们的VG可以独立于其他性状来提高VP。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Archivos de Zootecnia Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

0.50

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0.00%

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期刊介绍： Archivos de Zootecnia is a quarterly, multilingual, international science journal, published by the University of Cordoba and the Asociación Iberoamericana de Zootecnia. The journal was founded in 1952 as the voice for the Zootechnics Institute of the Veterinary Faculty at the University of Cordoba. Its aim is to disseminate results from research into animal production and related areas, giving special attention to farming systems in developing areas, their local breeds and alternative production methods.