Results 301 to 310 of about 560,911 (341)
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II. Breeds and breeding practices
New Zealand Journal of Experimental Agriculture, 1979Abstract A national questionnaire of farms with pigs, carried out in April 1977, was used as a source of data on the extent of use of purebred v. homebred stock in commercial herds, the fate and average age of performance-tested boars, the extent of crossbreeding, and the identity of breeds and crossbred types of stock.
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Journal of Ornithology, 2006
Traditionally, investigation of the dynamics of avian migration has been heavily biased towards the autumn return trip to the wintering quarters. Since the migratory prelude to breeding has direct fitness consequences, the European Science Foundation recently redressed the balance and sponsored a workshop on spring travels.
Julia Stahl +3 more
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Traditionally, investigation of the dynamics of avian migration has been heavily biased towards the autumn return trip to the wintering quarters. Since the migratory prelude to breeding has direct fitness consequences, the European Science Foundation recently redressed the balance and sponsored a workshop on spring travels.
Julia Stahl +3 more
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Breeding Methods and Breeding Research
2002In a broad sense, the term “ornamental plants” covers all kinds of plants used for one ornamental purpose or another in homes, gardens and parks. Ornamental plant breeding, therefore, covers the breeding of all ornamental plants in the broad sense. On the other hand, floriculture includes mostly herbaceous ornamental plant species, i.e., bedding plants,
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Dog breeding and breeding practices: example of French breeds.
2009International ...
Leroy, Grégoire +3 more
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Breeding (1): Timing of Breeding
1996With regard to the timing of breeding in birds, “by far the most important ultimate factor for nearly all species of birds is the availability of an adequate food supply…. Each species has therefore evolved the timing of its breeding so that it coincides with a maximum availability of its species-specific food” (Immelmann 1971).
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Science, 2014
I read with interest the In Depth story “Racing for disaster?” (A. Gibbons, 13 June, p. [1213][1]) on breeding thoroughbreds for speed, and the concerns about inbreeding and the resulting shrinkage of the gene pool. As Gibbons points out, such selection for speed generally involves putting 3-year-old stallions out to stud after winning one or more high-
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I read with interest the In Depth story “Racing for disaster?” (A. Gibbons, 13 June, p. [1213][1]) on breeding thoroughbreds for speed, and the concerns about inbreeding and the resulting shrinkage of the gene pool. As Gibbons points out, such selection for speed generally involves putting 3-year-old stallions out to stud after winning one or more high-
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Breeding (2): Ecology of Breeding
1996Once breeding activity has been initiated under the influence of the various environmental stimuli described in the previous chapter, courtship, nestbuilding (where relevant) and subsequent parental behaviour follow in sequence. These activities may involve finding appropriate nesting materials (for example, green grass in the case of weavers Ploceus ...
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To breed, or not to breed? Predation risk induces breeding suppression in common voles
Oecologia, 2012Breeding suppression hypothesis (BSH) predicts that, in several vole species, females will suppress breeding in response to high risk of mustelid predation; compared to breeding females, suppressing females would gain higher chances of survival. Seminal evidence for BSH was obtained in the laboratory, but attempts to replicate breeding suppression ...
Mateusz Jochym, Stefan Halle
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Tree Genetics & Genomes, 2012
We developed a deterministic model to optimize DNA fingerprinting effort in the presence of gene flow during the application of Breeding without Breeding. The method considers trait’s heritability, level of gene flow, selection differential, and the proportion of progeny test subjected to fingerprinting (truncation).
Yousry A. El-Kassaby +4 more
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We developed a deterministic model to optimize DNA fingerprinting effort in the presence of gene flow during the application of Breeding without Breeding. The method considers trait’s heritability, level of gene flow, selection differential, and the proportion of progeny test subjected to fingerprinting (truncation).
Yousry A. El-Kassaby +4 more
openaire +2 more sources