使肉牛整体生长最大化但限制出生体重和其他性状的选择指数。

IF 2.5 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Kenji Togashi, Toshio Watanabe, Atsushi Ogino, Masakazu Shinomiya, Kazuhito Kurogi, Masanobu Nurimoto
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引用次数: 0

摘要

目标:在整个成长期实现增长最大化是牛肉行业的一个实际目标。。我们开发了一种新的选择指数,称为最大生长指数,通过赋予任意值的选择强度,在整个生长过程中最大化生长,同时在指定的时间点实现所需的体重增加。方法:我们使用一种叫做拉格朗日乘数的技术,在整个生长过程中使整体生长最大化,并在特定时间将体重增加限制在所需的数量。采用随机回归(RR)对生长曲线进行分析,并以遗传增强育种值(GEBVs)作为选择指标性状,建立了选择指数。结果:基于日本黑阉牛的假设数据,应用开发的指数示例。在生长期最大化生长和适度出生体重的选择使生长过程中体重增加呈上凸曲线,日增重峰值比没有选择的日增重峰值更大、更早。选择强度为0.5时,约束出生体重降低2.5 kg的指标比未选择时提前8周达到预选择最终体重。结论:建立的肉牛选择指标能最大限度地提高生长期总增重,同时限制出生体重等性状。我们开发的最大生长指数可以在减少出生体重的同时增加最终体重,从而通过增加最终体重和防止难产而使牛肉行业受益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Selection index for beef cattle that maximizes overall growth yet constrains birth weight and other traits.

Objective: : Maximizing growth throughout the growth period is a practical goal in the beef industry. We developed a novel selection index, called the maximum growth index, that maximizes the growth throughout the growth process and simultaneously achieves the desired weight gain at designated time points by assigning arbitrary values to selection intensity.

Methods: : We used a technique called Lagrange multipliers to maximize overall growth throughout the entire growth process and to restrict weight gains to desired amounts at specific times. We developed a selection index by applying random regression (RR) to the growth curve and using the genomically enhanced breeding values (GEBVs) of the RR coefficients as selection index traits.

Results: : Examples of the developed index was applied based on assumed data in Japanese Black steers. Selection to maximize growth during the growth period and to moderate birth weight yielded an upwardly convex curve for weight gain during the growth process, and the peak daily gain was greater and earlier than achieved without this selection. Under a selection intensity of 0.5, the index that constrained birth weight to decrease by 2.5 kg achieved the pre-selection final weight 8 weeks earlier than occurred without this selection.

Conclusion: : We developed a beef cattle selection index that maximized total weight gain during growth yet constrained birth weight and other traits. The maximum growth index that we developed enables reductions in birth weight concurrent with increases in final weight, thus benefiting the beef industry by increasing final weight and preventing dystocia.

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来源期刊
Animal Bioscience
Animal Bioscience AGRICULTURE, DAIRY & ANIMAL SCIENCE-
CiteScore
5.00
自引率
0.00%
发文量
223
审稿时长
3 months
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