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Year 2009 Remove constraint 2009: 2009 Subjects genetic variation Remove constraint genetic variation: genetic variation Subjects animal age Remove constraint animal age: animal age

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1. A longitudinal study of Giardia duodenalis genotypes in dairy cows from birth to 2 years of age

Description:: Includes references
Author:: Santín, Mónica , Trout, James M. , Fayer, Ronald
Subject:: dairy cows , cattle diseases , disease prevalence , Giardia lamblia , giardiasis , genotype , genetic variation , feces , animal age , cysts (developmental stages) , ribosomal RNA , nucleotide sequences , polymerase chain reaction , calves , heifers , disease reservoirs , Maryland
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2009

2. Effects of social interactions on empirical responses to selection for average daily gain of boars

Description:: Includes references
Author:: Chen, C.Y. , Johnson, R.K. , Newman, S. , Kachman, S.D. , Van Vleck, L.D.
Subject:: boars , liveweight gain , selection criteria , social environment , animal behavior , genotype , body weight , animal age , genetic variation , environmental factors , heritability , genetic variance , phenotypic variation , breeding value
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2009

3. Genetic and environmental factors that affect gestation length in dairy cattle

Description:: Includes references
Author:: Norman, H.D. , Wright, J.R. , Kuhn, M.T. , Hubbard, S.M. , Cole, J.B. , VanRaden, P.M.
Subject:: dairy cattle , pregnancy , genetic variation , environmental factors , calving , dairy breeds , breed differences , parity (reproduction) , animal age , lactation , milk yield , sires , litter size , sex ratio , genetic correlation , genes , prediction , fetal death , ease of birth
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2009