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How does sperm meet egg in mammals? An electron microscopist's view of how new life begins
, 2001 Breed, W.
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2018
In this chapter we discuss the history of the breeding of domesticated animals and how this practice produced varieties of animals with ‘breeding’, and that since the late-eighteenth century have been termed ‘breeds’. We consider the evolution of ideas on selective breeding through the nineteenth century and end with an assessment of the impact of the ...
Worboys, Michael +2 more
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In this chapter we discuss the history of the breeding of domesticated animals and how this practice produced varieties of animals with ‘breeding’, and that since the late-eighteenth century have been termed ‘breeds’. We consider the evolution of ideas on selective breeding through the nineteenth century and end with an assessment of the impact of the ...
Worboys, Michael +2 more
openaire +3 more sources
Intermittent breeding is associated with breeding group turnover in a cooperatively breeding bird
Oecologia, 2020Intermittent breeding, in which an adult skips a breeding opportunity, can represent a non-adaptive constraint or an adaptive response to the tradeoff between current and future reproduction. In group-living animals, the social group may also affect the frequency of reproduction, but this possibility has received little attention.
Maria G, Smith, Christina, Riehl
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BREEDS COMPOSITION IN THE BREEDING MEAT CATTLE BREEDING IN RUSSIA
Molochnoe i miasnoe skotovodstvo, 2021Изучен породный состав и численность племенного скота мясного направления продуктивности в Российской Федерации. На долю мясных пород в мире приходится 40% от всего поголовья крупного рогатого скота. В России специализированное мясное скотоводство как самостоятельную отрасль животноводства начали создавать в начале 30-х годов прошлого века.
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Acta agriculturae Slovenica. Suplement, 2001
Definitions of the term breed differ and are usually very general. They do not include any objective measurement to undoubtedly define any group of domestic animals as a breed. Also information on the origin of breeds is often very superficial; and data on the origin of the Lipizzan horse presented in the article prove that.
Andrej ŠALEHAR +3 more
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Definitions of the term breed differ and are usually very general. They do not include any objective measurement to undoubtedly define any group of domestic animals as a breed. Also information on the origin of breeds is often very superficial; and data on the origin of the Lipizzan horse presented in the article prove that.
Andrej ŠALEHAR +3 more
openaire +1 more source
, 2018 Abstract This chapter describes the main and minor cultivars, as well as other species and botanical varieties, of pineapple. The genetics and breeding system, including cytogenetics, selection, and rogueing, are discussed. Considerations in hand pollination, seed handling, germination and nursery management are also mentioned.
Sanewski, G. M. +2 more
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II. Breeds and breeding practices
New Zealand Journal of Crop and Horticultural Science, 1979A 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 ...
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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-
openaire +2 more sources
Acta Horticulturae, 1999
This review of the research undertaken on the most important fruit species is the result of the contributions of some French fruit breeders working at INRA (Institut National de la Recherche Agronomique) and CIRAD (Centre de cooperation Internationale en Recherche Agronomique pour le Developpement).
Lespinasse, Yves, Bakry, Frédéric
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This review of the research undertaken on the most important fruit species is the result of the contributions of some French fruit breeders working at INRA (Institut National de la Recherche Agronomique) and CIRAD (Centre de cooperation Internationale en Recherche Agronomique pour le Developpement).
Lespinasse, Yves, Bakry, Frédéric
openaire +4 more sources