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OUTBREEDING

OUTBREEDING. PERKAWINAN INDIVIDU-INDIVIDU YANG TIDAK MEMPUNYAI HUBUNGAN KEKERABATAN/ KELUARGA. EFEK GENETIK. Meningkatkan heterosigositas (menunrunkan homosigositas) BANGSA A X BANGSA B derajat heterosigositas (%) P --- AA X aa

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OUTBREEDING

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  1. OUTBREEDING PERKAWINAN INDIVIDU-INDIVIDU YANG TIDAK MEMPUNYAI HUBUNGAN KEKERABATAN/ KELUARGA EFEK GENETIK Meningkatkan heterosigositas (menunrunkan homosigositas) BANGSA A X BANGSA B derajat heterosigositas (%) P --- AA X aa F1 ---- Aa 100 F2 ---- 1 AA : 2 Aa : 1 aa 50 Derajat heterosigositas semakin rendah

  2. EFEK FENOTIP • MENINGKATKAN FITNESS, VIGORITAS • 2. MENINGKATKAN DAYA ADAPTASI, VIABILITAS, MENURUNKAN MORTALITAS • 3. MENINGKATKAN KERAGAMAN CARA MENGHITUNG HETEROSIS/ HYBRID VIGOR : % HETEROSIS = (RATAAN F1 – RATAAN ORANG TUA) X 100 RATAAN ORANG TUA PENYEBAB HETEROSIS : DOMINAN, OVERDOMINAN, EPISTASIS, ADITIF

  3. OUTCROSSING • 2. CROSSBREEDING MACAM-MACAM OUTBREEDING • TWO BREED CROSSES • BACKROSSING • CRISSCROSSING • THREE BREED CROSSES • THREE BREED ROTATIONAL CROSSES • FOUR BREED CROSSES • BREED/ BANGSA BISA DIGANTI LINE (GALUR)

  4. PR : • ALASAN PERSILANGAN LBH DR 2 BGS • PERKAWINAN ANTARA FULLSIB DAN HALFSIB • HETEROSIGOT, HOMOSIGOT • PO JANTAN BB 1 TH : • 1. 320 • 2. 300 • 3. 290 • 4. 305 • MADURA BETINA : DIPEROLEH ANAK-2 PO-MADURA DENGAN • 1. 220 8. 240 RATA-2 BB 1TH = 246 KG DENGAN SIMP. • BAKU • 2. 250 9. 215 = 29 KG • 3. 210 10. 245 BERAPAKAH PERSENTASE HETEROSIS DR • 4. 198 11. 235 PERSILANGAN TSB. ? • 5. 200 12. 228 • 6. 215 • 7. 250

  5. Nama Klas I : 1. Asfi

  6. TWO BREED CROSS THREE BREED CROSS

  7. THREE BREED CROSS COWS

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