Breeding
Mostrando 13-24 de 2890 artigos, teses e dissertações.
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13. Effective Sizes for Subdivided Populations
Many derivations of effective population sizes have been suggested in the literature; however, few account for the breeding structure and none can readily be expanded to subdivided populations. Breeding structures influence gene correlations through their effects on the number of breeding individuals of each sex, the mean number of progeny per female, and th
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14. Influence of breeding site availability on the oviposition behaviour of Aedes aegypti
Despite the importance of the mosquito Aedes aegypti in the transmission of arboviruses, such as yellow fever, Chikungunya fever and dengue fever, some aspects of their behaviour remain unknown. In the present study, the oviposition behaviour of Ae. aegypti females that were exposed to different densities of breeding sites (2, 4, 8 and 16) was evaluated in l
Mem. Inst. Oswaldo Cruz. Publicado em: 07/07/2015
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15. Familiar neighbors enhance breeding success in birds.
We tested the hypothesis that long-term familiarity with neighbors is advantageous by determining whether male red-winged blackbirds (Agelaius phoeniceus) breeding adjacent to familiar neighbors have better reproductive success than other males. Using data gathered during a 10-yr study of breeding success, we found that males with familiar neighbors fledged,
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16. Reproductive deficiency in bulls from synthetic breeds according to the type of crossbreed and the morphology of the Y chromosome
We used 550 Braford and 214 Brangus-Ibagé bulls to study the association between Y chromosome morphology and the evaluation of breeding-soundness, karyotyping and breeding records were used to assess Y chromosome morphology. In general, no direct association was detected between the individual type of Y chromosome and reproductive fitness as previously esti
Genetics and Molecular Biology. Publicado em: 2005
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17. The Optimum Structure of Breeding Flocks. I. Rate of Genetic Improvement under Different Breeding Plans
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18. Testicular echotexture and seminal quality of young Montana Tropical Compound bulls classified as sound and unsound for breeding
The objective of this study was to investigate the relationship between testicular echotexture and seminal quality, in addition to evaluate the testicular parenchyma echogenicity pattern in young Montana bulls classified as sound and unsound for breeding. Fifty-two young Montana Tropical Compound bulls from 22 to 33 months of age were used. The animals were
R. Bras. Zootec.. Publicado em: 2012-08
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19. Reproductive deficiency in bulls from synthetic breeds according to the type of crossbreed and the morphology of the Y chromosome
We used 550 Braford and 214 Brangus-lbagé bulls to study the association between Y chromosome morphology and the evaluation of breeding-soundness, karyotyping and breeding records were used to assess Y chromosome morphology. In general, no direct association was detected between the individual type of Y chromosome and reproductive fitness as previously esti
Publicado em: 2010
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20. Melhoramento vegetal participativo com ênfase na eficiência nutricional.
ABSTRACT: Participatory plant breeding uses a concept that joint formal (official researches institutions) and informal sector (farmers communities), combining the capabilities and the knowledge of both, and farmer's experiences, practices, and preferences. The goal is to join the yield improvement exploring the availabel farmer's agrobiodiversity and introd
Planaltina. Publicado em: 2011
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21. Melhoramento de plantas: progresso genético e ambiental.
ABSTRACT: The plant breeding plays basic role in the attainment of suitable and superior genotypes to be used for farmers. The estimates of the genetic and environmental progress reached by the breeding programs are important to quantify the efficiency of the executed works and to define new strategies of breeding programs. Some techniques had been developed
Planaltina. Publicado em: 2011
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22. A brief history of the forty-five years of the Epagri apple breeding program in Brazil
Abstract The E’AppleBP is the largest Brazilian apple breeding program in activity in Brazil, with Brazilian and international contributions to breeding of apple cultivars, under public funding. The main objectives are development of new apple cultivars with good local climate adaptation, disease resistance, high yield, high fruit quality, good fruit stora
Crop Breed. Appl. Biotechnol.. Publicado em: 31/10/2019
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23. The performance of promising advanced breeding lines in no till farming system.
2001
Annual Report of the Bean Improvement Cooperative. Publicado em: 2001
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24. Evaluation of some cultivars and advanced breeding lines in tropical lowland of Brazil.
2001
Annual Report of the Bean Improvement Cooperative. Publicado em: 2011
