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Genomic Selection in Dairy Cattle

Genomic Selection in Dairy Cattle. Dr.Wuttigrai Boonkum. Genomic Selection. Dairy cattle most are specialised dairy breed Holstein, Jersey, Brown Swiss, Ayrshire Some dual propose Simmental, Montbeliarde , Normande , etc More than 80% AI from AI companies

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Genomic Selection in Dairy Cattle

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  1. Genomic Selection in Dairy Cattle Dr.WuttigraiBoonkum

  2. Genomic Selection • Dairy cattle most are specialised dairy breed Holstein, Jersey, Brown Swiss, Ayrshire • Some dual propose Simmental, Montbeliarde, Normande, etc • More than 80% AI from AI companies • Global exchange of genetic so international genetic evaluation

  3. Genomic Selection P = G + E Genetic evaluation or Molecular genetics Appropriated major gene only Need time and data complete

  4. Reliable breeding values at young age higher success rate to get top bulls lower costs for test proofs shorter generation-interval Genomic Selection,What does it bring us?

  5. Reliability of breeding values 50% reliability is realistic

  6. Advantages of Genomic Selection • Increased genetic improvement (30-40%) • Higher genetic level of test sires • Higher genetic level of Delta embryo’s • Wider portfolio of commercial bulls & higher level • More outcross; less inbreeding

  7. Disadvantages of Genomic Selection • New method, not fully proven or tested • Need to genotype a sufficiently large set of animals for accurate GEBV • Across breed accuracy low • Genotypes still costly (10,000 bath/head)

  8. 1. การกำหนดเป้าหมายของการปรับปรุงพันธุ์โคนม

  9. 1. การกำหนดเป้าหมายของการปรับปรุงพันธุ์โคนม องค์ประกอบน้ำนม ผลผลิตน้ำนม ความสมบูรณ์พันธุ์ ลักษณะการต้านทานโรค ลักษณะโครงร่าง

  10. พันธุ์โคนมของประเทศไทยพันธุ์โคนมของประเทศไทย TMZ TF Friebrah

  11. 3. การใช้ระบบผสมข้ามพันธุ์ที่เหมาะสม Table 3Comparison of average of milk yield, reproductive performance and economic returns of Thai Friesian (TF), Thai milking zebu (TMZ) and Friebrah (FB) Source:(สดใส และคณะ, 2549 ก,ข)

  12. 4. การใช้พันธุศาสตร์โมเลกุลในการปรับปรุงพันธุ์โคนม Heritability high medium, low BLUP BLUP Traditional Selection index by MT-BLUP MAS Selection index by MA-BLUP Selection index including MA information Pre-selection by marker confirmed by MT-BLUP index Figure 6Dairy cattle improvement using BLUP and genetic marker scheme

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