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การประเมินพันธุกรรมความคงทนของการให้นํ้านมในโคนมลูกผสมโฮลสไตน์-ฟรีเชียนที่ให้ลูกครั้งแรกโดยใช้โมเดลรีเกรซชันสุ่ม Thai Agricultural
Phakphume Saowaphak; Monchai Duangjinda; Pongchan Na-Lampang; Pakanit Kuppitayanant; Choak Bulakul.
Objectives of this study were to 1) determine the appropriate Covariance Function Coefficient (CFC) number of Modified Normalized Legendre Polynomial (MNLP) using in Random Regression Models (RRLP) and 2) mathematical equation for calculate Persistency of Lactation (PL) value. All 9 RRLPs with different 3 to 5 CFC number nested within additive genetics and permanent environmental random effects were used to analyze total 25,845 test-day milk yield records of primiparous crossbred Holstein-Friesian dairy cattle from Chokchai farm. Variance components were estimated by average information-restricted maximum likelihood algorithm and predicted random effects with best linear unbiased prediction method. The results found that RRLP using 3 and 4 CFC numbers...
Tipo: Collection Palavras-chave: Persistency of lactation; Genetic evaluation; Random regression model; Primiparous crossbred Holstein-Friesian dairy cattle; โคนม; พันธุ์ลูกผสมโฮลสไตน์-ฟรีเชียน; การประเมินพันธุกรรม; โมเดลรีเกรซชันสุ่ม; ความคงทนของการให้นํ้านม; ค่าการผสมพันธุ์.
Ano: 2011 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5268
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