04292nam a2200229 a 450000100080000000500110000800800410001902000180006010000170007824500580009526000270015330000100018049000510019052036840024165000370392565000140396265000140397665000120399065000140400265300260401670000200404215260382025-02-13       1982    bl uuuu      00u1 u    #d  a92-5-101247-41 aMASON, J. I.  aBreeding plans for ruminant livestock in the tropics.  aRome: FAO, 1982.c1982  a89 p.  a(FAO. Animal Production and Health Paper, 34).  aChapter 1 INTRODUCTION: 1.1 Achievements in temperate countries,1.1.1 Improvement by breed replacement (grading up), 1.1.2 Improvement within breeds, 1.2 Transfer of technology to tropical environments, 1.2.1 Constraints on production in the tropics, 1.3 Environment and breeding policy. 1.4 Conservation; Chapter 2 RECORDING SYSTEMS: 2.1 Performance recording, 2.1.1, Recording for national level decisions, 2.1.2 Herd level recordin, 2.1.3 Recording in the tropics, 2.2 Recording in dairy cattle, 2.2.1 Milk recording practices, 2.2.2 Problems of milk recording in the tropics, 2.2.3 Alternatives to official recording in the tropic, 2.2.4 Milk composition, 2.2.5 Alternatives to monthly recording, 2.2.6 The problem of milk let-down in zebu herds, 2.2.7 Other records, 2.2.8 Records on the farm and production summaries, 2.3 Beef recording, 2.3.1, Background, 2.3.2 Recording in developed countries, 2.3.3 Recording of traits, 2.3.4 Recording procedures in the tropics for suckler calf systems, 2.4 Recording in sheep and goats, 2.4.1, Background, 2.4.2 Traits to be recorded, 2.4.3 Recording procedures; Chapter 3 Data processing: 3.1 Correction for environmental effects, 3.1.1 Correction factors 3.1.2 Use of correction factors, 3.2 Environmental factors influencing production, 3.2.1 Dairy cattle, 3.2.2 Beef cattle, 3.2.3 Sheep and goats, 3.3 Estimation of breeding values, 3.3.1 Dairy cattle, 3.3.2 Beef cattle, 3.3.3 Sheep and goats; Chapter 4 Selection programmes: 4.1 The place of selection programmes in genetic improvement, 4.1.1 Background, 4.1.2 Importance of selection in indigenous breeds in the tropics, 4.1.3 Selection procedures in developed countries, 4.2 Selection programmes in dairy cattle, 4.2.1 The importance of selection programmes in tropical breeds, 4.2.2 Selection programmes in developed countries, 4.2.3 Selection in institutional herds in the tropics, 4.2.4 Selection in new breed formation, 4.2.5 Selection programmes in the absence of either AI or milk recording or both, 4.3 Selection programmes in beef cattle, 4.3.1 Background, 4.3.2 Breed comparisons related to size, 4.3.3 Selection schemes in developed countries, 4.3.4 Important traits for tropical beef cattle, 4.3.5 Selection programmes in the tropics, 4.3.6 Dual testing for milk and beef, 4.4 Selection programmes in sheep and goats, 4.4.1 Background, 4.4.2 Sheep improvement programmes in developed countries, 4.4.3 Selection of sheep and goats in the tropics, 4.4.4 Selection for reproductive rate in sheep and goats, 4.4.5 A scheme for improvement of prolificacy and growth rate, 4.4.6 Nucleus breeding scheme, 4.4.7 Selection for milk and wool, 4.4.8 Selection in goats; Chapter 5 Importation: 5.1 Use of imports, 5.2 Sex and age of animals to be imported, 5.3 Which breed to import?, 5.3.1 European dairy cattle, 5.3.2 Tropical dairy breeds, 5.3.3 Beef cattle, 5.3.4 Buffaloes, 5.3.5 Sheep, 5.3.6 Goats, 5.4 Purebreds or crossbreds?, 5.5 How to select individuals, 5.5.1 Dairy cattle, 5.5.2 Beef cattle, 5.5.3 Sheep; Chapter 6 Crossbreeding: 6.1 Maintaining a crossbred population, 6.1.1 New breed formation, 6.1.2 Systematic crossbreeding, 6.1.3 Use of crossbred sires, 6.2 Choice of breeding system, 6.3 Application to different classes of animals, 6.3.1 Dairy cattle, 6.3.2 Beef cattle, 6.3.3 Sheep, 6.3.4 Goats. List of tables: Table 1.1 Ecology and cattle breeding policy for commercial and subsistence farmers in Kenya; Table 4.1 Calculation of productivity indices; Table 6.1 Performance of Danish Red, Indian zebu (Sahiwal and Red Sindhi) and their crossbreds in Thailand; Table 6.2 Hybrid vigour in dairy cattle crosses in Sri Lanka as shown by decline from F1 to F2.  aBreeding and Genetic Improvement  aLivestock  aRuminants  aTropics  aRuminante  aMelhoramento genetico1 aBUVANENDRAN, V.