Selection for prolificacy in Romney sheep II. Correlated responses
نویسندگان
چکیده
منابع مشابه
Selection for increased weaning or yearling weight in Hereford cattle. II. Direct and correlated responses.
Selection was applied from 1964 to 1978 for increased weaning weight (WWL) or yearling weight (YWL) in two Hereford lines. An Angus line was maintained as an unselected control line (CL). Each line was maintained with 50 cows and four sires each year (two sires selected each year and used for 2 yr). Primary traits measured in the lines were birth weight (BW), preweaning daily gain (WDG), weanin...
متن کاملScreening for Causative Mutations of Major Prolificacy Genes in Iranian Fat-Tailed Sheep
Objective The presence of different missense mutations in sheep breeds have shown that the bone morphogenetic protein receptor 1B (BMPR1B), bone morphogenetic protein 15 (BMP15) and growth differentiation factor 9 (GDF9) genes play a vital role in ovulation rate and prolificacy in ewes. Therefore, the present study investigates BMPR1B, BMP15 and GDF9 genes mutations in prolific ewes of Iranian ...
متن کاملSelection for egg production and correlated responses in the fowl.
HE effectiveness of selection for genetic improvement of egg production in the fowl remains a controversial issue. Mass selection on annual egg records has long been regarded as ineffective as demonstrated by the early work of PEARL (1915), while selection based on family records and progeny testing has seemed to be the key to success as demonstrated by the long-time selection experiments of DE...
متن کاملDirect and Correlated Responses to Selection
Hemolymph juvenile hormone esterase (JHE) activity on the third day of the last stadium in the cricket, Gryllus assirnilis, exhibited a significant response to selection in each of six replicate lines. Mean realized heritability was 0.26 t 0.04. The response was due to changes in whole-organism enzyme activity as well as to changes in the proportion of enzyme allocated to the hemolymph compartm...
متن کاملCorrelated quantal responses and equilibrium selection
This paper considers incomplete information games with payoffs subject to correlated random disturbances. It explains the connection between the uniqueness of quantal response equilibria, where large noise is required, and the uniqueness of equilibria in global games, where small noise is required. JEL classifications: C72, D82.
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ژورنال
عنوان ژورنال: Asian-Australasian Journal of Animal Sciences
سال: 1995
ISSN: 1011-2367,1976-5517
DOI: 10.5713/ajas.1995.29