1 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All.

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Presentation transcript:

1 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. CHAPTER 30 Sheep and Goat Breeds and Breeding

2 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Meat-Type Breeds

3 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Wool-Type and Dual- Purpose Breeds

4 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Categories of Sheep Breeds  Ewe breeds: Rambouillet, Debouillet, Merino, Corriedale, Targhee, Finnsheep, and Border Leicester  Ram breeds: Suffolk, Hampshire, Shropshire, Oxford, Southdown, Montadale, Cheviot  Dual-purpose breeds: Dorset, Columbia, Lincoln, Romney

5 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved.

6 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Major Goat Breeds BreedMilk (lb)Fat (lb)Protein (lb) Alpine2, LaMancha1, Nubian1, Oberhasli1, Saanen1, Toggenburg1,

7 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Boer Goats

8 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Angora Goats

9 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Reproductive Characteristics of Sheep and Goats CharacteristicSheepGoats Age at puberty: season and breed effects are large 5-12 months4-12 months Estrous cycle duration 16 days Length of estrus30 hours48 hours Gestation length: season and breed effects are large 147 days150 days

10 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Selection of Superior Rams

11 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Effects of Heterosis in Crossbred Lambs TraitPercent Heterosis Birth weight3 Weaning weight5 Post-weaning gain7 Survival to weaning10 Pounds of lamb weaned per exposed ewe 18

12 Scientific Farm Animal Production, 10 th ed Field and Taylor Copyright ©2012, 2008 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Typical Australian Crossing System to Produce Prime Lambs