Responses in ovulation rate, embryonal survival, and litter traits in swine to 14 generations of selection to increase litter size.

RK, Johnson; MK, Nielsen; DS, Casey

doi:10.2527/1999.773541x

Public

Responses in ovulation rate, embryonal survival, and litter traits in swine to 14 generations of selection to increase litter size.

Shared by NobleBlocks on Mar 1, 1999 • 12:00 AM UTC

Authors:

Johnson RK

Nielsen MK

Casey DS

Abstract

Eleven generations of selection for increased index of ovulation rate and embryonal survival rate, followed by three generations of selection for litter size, were practiced. Laparotomy was used to count corpora lutea and fetuses at 50 d of gestation. High-indexing gilts, approximately 30%, were far...

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