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การประมาณค่าพารามิเตอร์ทางพันธุกรรมการให้น้ำนมในแพะลูกผสม โดยใช้โมเดลวันทดสอบรีเกรซชั่นสุ่ม Thai Agricultural
Thumrong Thongchumroon; Mongkol Thepparat; Monchai Duangjinda; Suwit Anothaisinthawee.
Objective of this study was to estimate genetic parameters in crossbred goat between Thai native with Anglo-Nubian (AN), Toggenburg (TG), Saanen (SA) and Alpine (AP), for milk yield base on random regression test day model (RRTDM). The data analysis was based on 1,438 test day milk records between 2004 and 2006. RRTDM based on second-order Legendre polynomial function for additive genetic and permanent environment effects. Residual variance was adjusted for heterogeneity using exponential function. Heritability estimates were 0.088-0.535 and decreased from the beginning to the end of lactation with average of 0.238. The genetic lactation curve obtained from this study is useful for increasing accuracy of breeding values and selection strategies for...
Tipo: Collection Palavras-chave: Crossbred dairy goat; Milk yield; Heritability; Random regression test day model; แพะนม; พันธุ์ลูกผสม; ปริมาณน้ำนม; อัตราพันธุกรรม; โมเดลวันทดสอบรีเกรซชั่นสุ่ม.
Ano: 2011 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5180
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การประเมินพันธุกรรมและกราฟพันธุกรรมของการให้ผลผลิตไข่ในไก่พื้นเมืองไทย (ประดู่หางดำ) โดยใช้โมเดลวันทดสอบรีเกรซชั่นสุ่ม Thai Agricultural
Wuttigrai Boonkum; Monchai Duangjinda; Banyat Laopaiboon; Thevin Vongpralub.
Objective of this research was to investigate an appropriate random regression test-day model from various egg production functions for genetic evaluation and genetic curve construction for egg production in the first generation (G1) of Thai native chickens (Pradu Hang Dam). Data included 1,669 monthly egg production records of 203 Thai native chickens between September, 2007 and June, 2009. Data were obtained from the Research and Development Network Center for Animal Breeding (Native Chicken), Faculty of Agriculture, Khon Kaen University. An average (+SD) of yearly egg production was 140+36 eggs and average (+SD) age at first egg was 187+22 days. Considering to -2logL, AIC, and MSE, random regression test-day model with egg function of Koops and Grossman...
Tipo: Collection Palavras-chave: Egg production; Genetic evaluation; Thai native chicken; Random regression test-day model; Pradu Hang Dam; ไก่; พันธุ์พื้นเมืองไทย; พันธุ์ประดู่หางดำ; พันธุกรรม; โมเดลวันทดสอบรีเกรซชั่นสุ่ม; ผลผลิตไข่; กราฟพันธุกรรม.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5162
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