Backcross
Mostrando 13-24 de 352 artigos, teses e dissertações.
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13. Cytogenetic characterization of F1, F2 and backcross hybrids of the Neotropical catfish species Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum (Pimelodidae, Siluriformes)
The cytogenetic characteristics of Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum and their F1, F2 and backcross hybrids were assessed by using chromosome banding techniques. The diploid number of 56 chromosomes was constant in all species and lineages, with a karyotypic formula containing 20 metacentric, 12 submetacentric, 12 subtelocentric an
Genetics and Molecular Biology. Publicado em: 02/02/2012
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14. Marker-assisted selection for the rice blast resistance gene Pi-ar in a backcross population.
A doubled-haploid (DH) population, obtained by anther culture of F 1 plants from a cross between a highly susceptible rice cultivar Lijiangxintuanheigu and the resistant somaclone (SC09), of the cultivar Araguaia, was used to identify RAPD markers linked to the blast resistance gene Pi-ar. The 86 DH plants, inoculated with the race IB-9 of Magnaporthe oryzae
Crop Breeding and Applied Biotechnology. Publicado em: 2011
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15. Development of herbicide-tolerant irrigated rice cultivars.
The objective of this work was to develop new irrigated rice lines tolerant to imidazolinone herbicides. The backcross breeding procedure was used to transfer the imidazolinone tolerance allele from mutant 93AS3510 to the recurrent parents 'BRS 7 Taim' and 'BRS Pelota'. Individual herbicide-tolerant plants were selected in each generation, for three backcros
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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16. Development of herbicide-tolerant irrigated rice cultivars.
The objective of this work was to develop new irrigated rice lines tolerant to imidazolinone herbicides. The backcross breeding procedure was used to transfer the imidazolinone tolerance allele from mutant 93AS3510 to the recurrent parents 'BRS 7 Taim' and 'BRS Pelota'. Individual herbicide-tolerant plants were selected in each generation, for three backcros
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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17. Alternativas na selecao de plantas de feijoeiro com porte ereto e grao tipo carioca.
No feijoeiro (Phaseolus vulgaris L.), o porte ereto da planta e os graos cor creme-clara com estrias marrons - tipo carioca - sao caracteres importantes na adocao das novas cultivares pelos agricultores. Como tem havido dificuldade em associar essas duas caracteristicas, foram obtidas populacoes segregantes com diferentes frequencias alelicas visando verific
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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18. Identificação e caracterização de plantas de feijão-caupi obtidas por meio de retrocruzamento resistentes aos vírus cowpea severe mosaic virus (CPSMV) e cowpea aphid borne mosaic virus (CABMV). 2010 / Identification and characterization of cowpea plants obtain by backcross resistant to viruses Cowpea severe mosaic virus (CPSMV) and Cowpea aphid borne mosaic virus (CABMV). 2010
Diversas doenças causadas por diferentes espécies de patógenos podem afetar a cultura do feijão-caupi, promovendo redução considerável do seu potencial produtivo. Dentre as doenças de larga ocorrência se destacam as viroses, merecendo maior ênfase as causadas pelos vírus das famílias Comoviridae e Potyviridae, com as espécies Cowpea severe mosai
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/08/2010
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19. Proposta para ampliação da base genética por meio de cruzamento interespecífico no pré-melhoramento do tomateiro / Proposal for amplification the genetic base for interespecific cross in tomato pre-breeding.
The aim of this study was to evaluate: 1 - the variability among families resistant PepYMV from the crossing between S.lycopersicum and S.habrochaites; 2 - the contribution of variability in this cross for the breeding of tomato. The diversity assessment was performed with a square lattice design experiment with two replications and three plants per plot. Th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/03/2010
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20. Analysis of storage proteins of wild rice Oryza glumaepatula strains and interspecific Oryza sativa x Others Glumaepatula / Análise das proteínas de reserva do arroz silvestre oryza glumaepatula e de linhagens interespecíficas oryza sativa x o. Glumaepatula
The objective of this dissertation was to analyze quantitative and qualitatively the total storage protein content and its fractions albumin, globulin, prolamin and glutelin from the grain of 29 genotypes of the wild rice Oryza glumaepatula and 70 interspecific lines backcross 2 obtained from the cross O. sativa x O. glumaepatula. From these lines, 34 BC2F8
Publicado em: 2010
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21. Estudo da herança dos caracteres stay-green, produção e seus componentes em milho utilizando o delineamento III e mapeamento de QTL / Inheritance study of stay-green, yield and its components in maize using the design III and QTL mapping
Maize is one of the most important agricultural activities in Brazil. The country is the third largest world producer and the yield rose from 1800 kg ha-1 to 3000 kg ha-1 in the last 15 years. The grain yield and drought tolerance are complex traits, difficult to select. A possibility to increase the efficiency of breeding programs that aims to improve the g
Publicado em: 2009
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22. Genetic control of common bean resistance to white mold and backcross assisted by microsatellite markers / GENÃTICA DA RESISTÃNCIA DO FEIJOEIRO AO MOFO BRANCO E USO DO RETROCRUZAMENTO ASSISTIDO POR MARCADORES MICROSSATÃLITES.
The identification of sources of resistance to the white mold in common bean, and the study of its inheritance is primordial for the success of breeding programs aiming at resistant cultivars. The present research had the objectives: 1) to study the nature and the magnitude of genetic effects of resistance to white mold 2) use microsatellite (SSR) markers to
Publicado em: 2009
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23. GENÉTICA DOS TEORES DE FÓSFORO E DE ZINCO EM SEMENTES DE FEIJÃO / GENETIC OF THE PHOSPHORUS AND ZINC CONTENTS IN COMMON BEAN SEEDS
The common bean (Phaseolus vulgaris L.) stands out as an important source of phosphorus and zinc in for human consumption. Therefore, the legume can be used to reduce the risk of deficiency of phosphorus and zinc and to reduce the number of cases of malnutrition. The objectives of this research were: (1) investigate the presence of maternal effect for phosph
Publicado em: 2009
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24. Herança da produção de grãos e dos componentes de produção em soja / Inheritance of grain production and yield components in soybean
The knowledge of inheritance of traits is very important for breeding purposes. However, the inheritance is highly influenced by the environment and the genotypic composition of the population and thus, the accumulative information of estimates is very important for a better knowledge of the inheritance of quantitative traits. Most of the studies of inherita
Publicado em: 2009