發(fā)布時(shí)間：2019-08-19 09:37

【摘要】：旨在探討非遺傳因素對(duì)伊犁馬體尺性狀的影響及各體尺性狀的遺傳參數(shù),本研究利用新疆伊犁昭蘇縣2005-2014年年齡在1~11歲的伊犁馬體尺性狀的1 556條記錄,對(duì)影響伊犁馬體尺性狀的非遺傳因素進(jìn)行最小二乘方差分析,并利用動(dòng)物模型約束最大似然(Restricted maximum likelihood,REML)方法估計(jì)體尺性狀的遺傳力及性狀之間的遺傳相關(guān)。結(jié)果表明,場(chǎng)、年齡和出生年度效應(yīng)對(duì)伊犁馬體高、體長(zhǎng)、胸圍和管圍性狀均有極顯著影響(P0.01),性別效應(yīng)對(duì)伊犁馬的體高、體長(zhǎng)和管圍有極顯著影響(P0.01),但是對(duì)胸圍性狀影響不顯著(P0.05)。體高、體長(zhǎng)、胸圍和管圍的遺傳力分別為0.87、0.67、0.40和0.52;體長(zhǎng)與胸圍的遺傳相關(guān)最高,相關(guān)系數(shù)為0.93,體高與管圍的表型相關(guān)最高,相關(guān)系數(shù)為0.65;體高與體長(zhǎng)、胸圍和管圍分別呈現(xiàn)極顯著表型相關(guān)(P0.01),體長(zhǎng)與胸圍和管圍分別呈現(xiàn)極顯著表型相關(guān)(P0.01),管圍和胸圍也呈現(xiàn)極顯著表型相關(guān)(P0.01)。上述研究為伊犁馬今后在遺傳評(píng)定與遺傳參數(shù)估計(jì)中設(shè)計(jì)合理的統(tǒng)計(jì)分析模型提供了必要的參考依據(jù)。
[Abstract]:The purpose of this study was to investigate the effect of non-genetic factors on the body size traits of Yili horses and the genetic parameters of each body size traits. In this study, the non-genetic factors affecting the body size traits of Yili horses were analyzed by least square variance analysis, and the maximum likelihood (Restricted maximum likelihood, was constrained by animal model by using 1 556 records of Yili horse body size traits in Yili Zhaosu County, Xinjiang from 2005 to 2014. REML) method was used to estimate the heritability of body size traits and the genetic correlation between them. The results showed that field, age and birth year had a significant effect on the body height, body length, chest circumference and tube circumference of Yili horse (P 0.01). The gender effect had a very significant effect on the body height, body length and tube circumference of Yili horse (P 0.01), but had no significant effect on chest circumference traits (P 0.05). The heritabilities of body height, body length, chest circumference and tube circumference were 0.87, 0.67, 0.40 and 0.52, respectively, and the genetic correlation between body length and chest circumference was the highest, the correlation coefficient was 0.93, and the phenotypic correlation coefficient between body height and tube circumference was the highest, and the correlation coefficient was 0.65. Body height was significantly correlated with body length, chest circumference and tube circumference (P 0.01), body length was significantly correlated with chest circumference and tube circumference (P 0.01), and tube circumference and chest circumference were also significantly correlated (P 0.01). The above studies provide a necessary reference for the design of reasonable statistical analysis model in genetic evaluation and genetic parameter estimation of Yili horse in the future.
【作者單位】： 東北農(nóng)業(yè)大學(xué)動(dòng)物醫(yī)學(xué)學(xué)院;昭蘇縣畜牧獸醫(yī)站;新疆農(nóng)業(yè)大學(xué)動(dòng)物科學(xué)學(xué)院;
【基金】：新疆維吾爾自治區(qū)青年科技創(chuàng)新人才培養(yǎng)工程(qn2015bx008)
【分類號(hào)】：S821.83

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