GENETIC+SELECTION

GENETIC+SELECTION - IMPROVINGWELFARE ,orchange theanimal...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
11/23/2010 1 IMPROVING WELFARE Change the environment, or change the animal GENETIC SELECTION Welfare problems related to genetic selection for desirable traits Other welfare problems that have strongly heritable aspect heritable aspects What about genetic engineering? GENETIC SELECTION Slow Many generations, involving large numbers of animals, to select for new traits while retaining previous selection advantage Need additive genetic variation for selection to be effective Moderately to highly heritable
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
11/23/2010 2 Genetic Selection Selection ‘space’ Undesirable effects associated with selection to reduce problems Ei Economic Create other welfare problems Limited usefulness in some situations PROBLEMS INTRODUCED BY SELECTION Lameness in broiler chickens, pigs, and large breeds of dogs Stress susceptibility in pigs selected for lean meat Other production related disorders (mastitis, Other production related disorders (mastitis, osteoporosis) Physical disabilities in dogs selected for various phenotypes BROILER CHICKENS Selection for: Feed conversion Conformation (broad bt breast) Fast growth Now reach full adult weight in 6 vs. 17 wk
Background image of page 2
11/23/2010 3 SELECTION FOR GROWTH Ascites
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/26/2011 for the course ANS 18 taught by Professor Mchenry during the Spring '11 term at UC Davis.

Page1 / 8

GENETIC+SELECTION - IMPROVINGWELFARE ,orchange theanimal...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online