Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Genetic trends in selection for pelt traits in Karakul sheep. I. Direct responses.

Abstract

Genetic trends were estimated in a randombred control flock (2504 records), and in flocks selected for increased hair length (2787 records), hair pattern score (2406 records), increased hair quality (2531 records) or curl development (2283 records) for 12 years (3.6 generations). The control flock did not remain genetically stable, as pattern and hair quality showed small positive changes while curl development and hair length showed small negative changes. The mean annual response was 2.52, 1.31, 2.96 and 7.1% for the pattern, hair quality, hair length and curl development lines respectively; corresponding realized h2s were 0.20, 0.34, 0.63 and 0.56. [For Pt II. see pp. 170-175 of the same number of the journal].