Results 271 to 280 of about 1,385,080 (304)
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Quantitative trait loci for male reproductive traits in beef cattle*
Animal Genetics, 2004SummaryThe objective of the present study was to detect quantitative trait loci (QTL) for male reproductive traits in a half‐sib family from a Bos indicus (Brahman) × Bos taurus (Hereford) sire. The sire was mated with MARC III (1/4 Hereford, 1/4 Angus, 1/4 Red Poll and 1/4 Pinzgauer) cows.
E, Casas, D D, Lunstra, R T, Stone
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Analysis of the Laying Rhythm and Reproductive Traits of Geese
Folia Biologica, 2006 The aim of the performed investigations was to analyse the laying rhythm and reproductive traits of Kołuda white geese from the W11 reproduction strain and to determine the heritability of these traits as well as correlations between the laying rhythm traits and reproductive traits. The total number of geese participating in the experiment included 383
Sebastian Nowaczewski
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Reproduction traits in the Boer goat doe
Small Ruminant Research, 2000The aim of this review is to give insight into the reproduction potential of the Boer goat doe. Assessment of the reproduction traits in the Boer goat doe demonstrates a mean body weight at puberty of between 30.6 and 27.5kg, depending on the dietary energy level.
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Hormonal indexes as predictors of porcine reproductive traits
Animal Science Journal, 2023AbstractThe aim of the present study was to examine the applicability of several hormonal indexes for early prediction of puberty and reproductive state in pigs. For this purpose, we have compared the level of hormones leptin, estradiol, progesterone, and IGF‐I in the blood of gilts at 150 days of age and their indexes of puberty and ovarian state at ...
Alexander V. Sirotkin, Juraj Pivko
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Maternal Traits and Reproduction in Richardson's Ground Squirrels
Ecology, 1995Differences among conspecifics in body mass result from underlying differences in structural size and physiological condition. To determine whether the structural or physiological component of body mass has a stronger influence on reproductive traits at parturition, we studied the body composition (lean dry mass and fat content), structural size (1st ...
Dobson, F. Stephen, Michener, Gail R.
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Reproductive Traits in Aquatic Animals
2005Controlled breeding is only possible if there is enough knowledge about the factors governing reproduction to close the reproductive cycle. Lack of such knowledge has prevented the establishment of breeding programs for several of the farmed species. The elements of controlled breeding, artificial fertilisation and hatchery rearing, must be possible ...
Terje Refstie, Trygve Gjedrem
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Genomic prediction of reproduction traits for Merino sheep
Animal Genetics, 2017SummaryEconomically important reproduction traits in sheep, such as number of lambs weaned and litter size, are expressed only in females and later in life after most selection decisions are made, which makes them ideal candidates for genomic selection.
Bolormaa, S. +5 more
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Reproductive Traits of Trees in OFR
2002When plants start to reproduce (when they reach a certain size or the age of onset of flowering and fruiting), how often and how many of the plants produce offspring during their lifetime (frequency of reproduction) and how many offspring are produced in a year (magnitude of reproduction) are important factors of plant demography, because these factors
Mitsue Shibata, Hiroshi Tanaka
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Reproductive isolation with a learned trait in a structured population
Evolution, 2015Assortative mating displays and/or preferences can be affected by learning across a wide range of animal taxa, but the specifics of how this learning affects speciation with gene flow are not well understood. We use population genetic models with trait learning to investigate how the identity of the tutor affects the divergence of a self-referent ...
Yeh, J. ; https://orcid.org/0000-0003-2463-9469 +1 more
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Effect of transgenesis on reproductive traits of rabbit males
Animal Reproduction Science, 2007The influence of foreign transgene integration on the reproductive capabilities of rabbit males is not known. Therefore, we analyzed their ejaculate characteristics, reproductive capabilities, occurrence of pathological spermatozoa and histological structure of the testis.
Peter, Chrenek +6 more
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