Results 241 to 250 of about 25,988,003 (300)
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Trends in Ecology & Evolution, 1996
The study of breeding systems explores relationships between mating behaviour and parental care. Recent findings have shown that in many birds, fishes, anurans, and insects, females play a more active role than previously thought, by engaging in mate choice, mating with more than one male, and selecting genetic partners separately from social partners.
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The study of breeding systems explores relationships between mating behaviour and parental care. Recent findings have shown that in many birds, fishes, anurans, and insects, females play a more active role than previously thought, by engaging in mate choice, mating with more than one male, and selecting genetic partners separately from social partners.
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Breeding systems and genome evolution
Current Opinion in Genetics & Development, 2001The profound effects of inbreeding and other non-recombining breeding systems on genetic variability and molecular evolution are now beginning to be understood. Theoretical models predict how such populations are expected to differ from outcrossed populations, and DNA sequence data are being collected and used to test the predictions.
D, Charlesworth, S I, Wright
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Breeding systems in Coriaria (Coriariaceae)
Botanical Journal of the Linnean Society, 1995Species ofCoriariaare wind-pollinated and self-compatible. Discrepancies in the literature regarding sex expression in the genus may be attributed to inter- and intra-floral dichogamy. The southern hemisphere species and the HimalayanC. terminalisare evergreen phanerophytes or high elevation hemicryptophytes, which flower on new wood. Their racemes are
Thompson, PN, Gornall, RJ
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Climate change challenges plant breeding.
Current opinion in plant biology, 2022Plant breeding is important to cope with climate change impacts, complementing crop management and policy interventions to ensure global food production.
W. Xiong, M. Reynolds, Yunbi Xu
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Transposon dynamics and the breeding system
Genetica, 1999The selfish DNA hypothesis predicts that natural selection is responsible for preventing the unregulated build up of transposable elements in organismal genomes. Accordingly, between-species differences in the strength and effectiveness of selection against transposons should be important in driving the evolution of transposon activity and abundance ...
S I, Wright, D J, Schoen
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Systemic malacoplakia in a breeding pig
Journal of Comparative Pathology, 1985An adult breeding pig had multiple disseminated lesions in several organs of the thoracic and abdominal cavities. Histopathologically, the lesions consisted of accumulated histiocytic cells with a few giant cells and a mild infiltration of lymphocytes and plasma cells associated with concentric laminated spherical Michaelis-Gutmann bodies which stained
H, Taniyama, T, Ono, T, Matsui
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A comprehensive breeding system
Der Züchter, 1967An outline of a comprehensive breeding system developed and used by the Kenya Maize Research Section is presented. This system has four main phases: 1. Evaluation of local and exotic varieties so that the breeding material is the best available. 2. Compositing the selected breeding material into two or more populations or varieties in
S. A. Eberhart, M. N. Harrison, F. Ogada
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Breeding systems in thePolemoniaceae
Plant Systematics and Evolution, 1990Pollen — ovule ratios and percentages of stigmatic pollen germination (SPG) were measured for over 160 taxa of thePolemoniaceae. When related to taxa with known breeding systems, it is found that low SPGs and high P:O ratios characterize xenogamous plants, high SPGs and low P:Os characterize autogamous plants.
Uzi Plitmann, Donald A. Levin
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1991
In Chapter 3, it was stated that the genetic aspects of the production system set both the limits and potential for performance of the system. The breeding stock input into the system introduces potentials for animal performance but these are not usually exceeded (experimental lean growth promotants such as ractopamine and somatotropins do increase ...
Wilson G. Pond +2 more
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In Chapter 3, it was stated that the genetic aspects of the production system set both the limits and potential for performance of the system. The breeding stock input into the system introduces potentials for animal performance but these are not usually exceeded (experimental lean growth promotants such as ractopamine and somatotropins do increase ...
Wilson G. Pond +2 more
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2003
Abstract Sexual reproduction often involves substantial amounts of time and resources devoted to competition for mates, courtship, and mate choice. These behaviors may be underpinned by elaborate physical traits, such as acute sensory systems, bright color patterns, gawdy ornaments, and formidable weapons.
Ian A Fleming, John D Reynolds
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Abstract Sexual reproduction often involves substantial amounts of time and resources devoted to competition for mates, courtship, and mate choice. These behaviors may be underpinned by elaborate physical traits, such as acute sensory systems, bright color patterns, gawdy ornaments, and formidable weapons.
Ian A Fleming, John D Reynolds
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