Published May 1977. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
I. REPRODUCTION AND LAMB PRODUCTION Relationships among hemoglobin (Hb) genotypes and reproduction and production traits were examined in 294 four- and five-year-old North Country Cheviot, Dorset, Finnsheep or Romney x Suffolk or Columbia-type crossbred ewes. Hb BB ewe lambs were youngest at first estrus and Hb AA ewe lambs were...
A total of 399 crossbred ewes from two birth years were raised
under two management systems, irrigated vs. dryland hill pastures.
The crossbred ewes were sired by North Country Cheviot, Dorset, Finnsheep
and Romney rams that were mated to Suffolk and Columbia-type
ewes. Hampshire rams were the terminal sire breed...
I. The Effects of Sire Breed, Forage Availability and Weather on the
Grazing Behavior of Crossbred Ewes.
Thirty nonpregnant, nonlactating crossbred ewes, six per sire
breed (Suffolk, Clun Forest, Dorset, Polypay and Border Leicester),
were observed grazing together in a 0.87 ha grass-clover pasture for
six days over a two-week...
One thousand twenty-three lambing records of 351 ewes bred in a
rotational crossbreeding system involving Columbia or Targhee,
Hampshire and Finnish Landrace breeds were examined. A regression
approach was used to determine the effects of breeds and heterosis on
wool grade, greasy fleece weight, ewe weight at lambing, lambing date,...
Genetic and environmental factors affecting age of first estrus,
wool production, reproduction and lamb production were examined in
eight groups of crossbred ewe lambs from two birth years. The 399
ewe lambs whose first year production was analyzed were from eight
crossbred groups resulting from mating North Country Cheviot, Dorset,...