Double Haploid
Mostrando 1-12 de 78 artigos, teses e dissertações.
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1. BRS 331 - Early cycle double-haploid wheat cultivar
Abstract The wheat cultivar ‘BRS 331’ was developed by Embrapa. It results from an interspecific cross between wheat and maize by double-hapolid method. ‘BRS 331’ shows solid stem in the base of the plant, short leaves and super-early cycle to maturity. It is classified as bread wheat in all of the regions that is recommended in the States of Rio Gra
Crop Breed. Appl. Biotechnol.. Publicado em: 2017-03
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2. Detection of self-incompatible oilseed rape plants (Brassica napus L.) based on molecular markers for identification of the class I S haplotype
The selection of desirable genotypes with recessive characteristics, such as self-incompatible plants, is often difficult or even impossible and represents a crucial barrier in accelerating the breeding process. Molecular approaches and selection based on molecular markers can allow breeders to overcome this limitation. The use of self-incompatibility is an
Genet. Mol. Biol.. Publicado em: 2014-09
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3. BRS 328 - Double haploid bread wheat cultivar
The wheat cultivar 'BRS 328' was developed by Embrapa from a cross between KleinH3394 and PF 990744. The pre-harvest sprouting resistance of 'BRS 328' is good and the grain yield high. It is classified as bread wheat cultivar in all regions where it is recommended for cultivation.
Crop Breed. Appl. Biotechnol.. Publicado em: 2014-03
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4. Cultura de anteras e partenogênese in situ e in vitro de genótipos de laranja doce (Citrus sinensis Osbeck.) / Anther culture and in vitro and in situ parthenogenesis of sweet orange (Citrus sinensis Osbeck.) genotypes
The production of completely homozygous lines in citrus breeding program is hard, and double-haploid plantlets (completely homozygous lines) can be used to improve these breeding programs. However, many factors are associated with the success of the regeneration of haploid or double-haploid plants. The aim of this study was the induction and regeneration of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/06/2012
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5. Avaliação de genótipos e cruzamentos de arroz (Oryza sativa L.) quanto à resposta a cultura de anteras e estresse por ferro. / Avaliação de genótipos e cruzamentos de arroz (Oryza sativa L.) quanto à resposta a cultura de anteras e estresse por ferro. / Evaluation of genotypes and crosses of rice (Oryza sativa L.) as the response to anther culture and iron stress. / Evaluation of genotypes and crosses of rice (Oryza sativa L.) as the response to anther culture and iron stress.
A cultura de anteras de arroz é uma técnica utilizada para a obtenção de plantas haplóides. Esta técnica tem grande utilidade no melhoramento de plantas, pois possibilita a obtenção de plantas totalmente homozigotas em apenas uma geração. Desta forma, características importantes e de caráter recessivo são manifestadas sem a necessidade de conduz
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/02/2011
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6. Transcript levels of ten caste-related genes in adult diploid males of Melipona quadrifasciata (Hymenoptera, Apidae): a comparison with haploid males, queens and workers
In Hymenoptera, homozygosity at the sex locus results in the production of diploid males. In social species, these pose a double burden by having low fitness and drawing resources normally spent for increasing the work force of a colony. Yet, diploid males are of academic interest as they can elucidate effects of ploidy (normal males are haploid, whereas the
Genetics and Molecular Biology. Publicado em: 28/10/2011
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7. Cytogenetic analysis of Astylus antis (Perty, 1830) (Coleoptera, Melyridae): Karyotype, heterochromatin and location of ribosomal genes
Cytogenetic analysis of Astylus antis using mitotic and meiotic cells was performed to characterize the haploid and diploid numbers, sex determination system, chromosome morphology, constitutive heterochromatin distribution pattern and chromosomes carrying nucleolus organizer regions (NORs). Analysis of spermatogonial metaphase cells revealed the diploid num
Genetics and Molecular Biology. Publicado em: 07/06/2010
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8. Estabilidade fenotípica de genótipos de algodoeiros obtidos por semigamia no Estado de Minas Gerais
The objectives of this research were: to evaluate the performance of doublehaploid cotton genotypes (HD) in relation to their parental genotypes in three contrasting environments of the state of Minas Gerais, Brazil, and to determine the possible genotype by environment interactions and stability and adaptability parameters. In the state of Minas Gerais, Bra
Publicado em: 2008
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9. Mapeamento de QTLs para resistência a grãos ardidos causados por diplodia (Stenocarpella Sp.) em milho (Zea Mays L.)
Grãos ardidos causados pelos fungos Stenocarpella maydis (Berkeley) e Stenocarpella macrospora (Earle) tem se constituído num dos maiores fatores limitantes para a produção de milho (Zea mays L.) no Brasil. Estes fungos podem causar infecções no colmo, folhas e grãos, podendo ocasionar reduções significativas na produtividade e na qualidade do grão
Publicado em: 2008
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10. Estimating the effects of population size and type on the accuracy of genetic maps
Based on simulation studies, it was shown that the type and size of experimental populations can exert an influence on the accuracy of genetic maps. A hypothetical genome map (one chromosome with nine equidistant molecular markers) was generated for the following population types: F2 with dominant and co-dominant markers, backcrossing, recombinant inbred lin
Genetics and Molecular Biology. Publicado em: 2006
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11. Genetic mapping by molecular markers with gametic and genotypic segregation distortion / Mapeamento genético utilizando marcadores moleculares com distorção de segregação gamética e genotípica
The development of the genetic maps based on DNA markers has been providing remarkable progresses to the genomics of plants and animals. The construction of a genetic map is performed, by using data from the segregant populations, that usually are backcrossing, F2 generation, RILs, double-haploids and others. A mendelian segregation pattern that is typical t
Publicado em: 2006
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12. Genetic analysis of adult-plant resistance to leaf rust in a double haploid wheat (Triticum aestivum L. em Thell) population
A genetic analysis of adult plant resistance to leaf rust (Puccinia triticina) was performed in in vitro obtained double haploid progenies from a cross between the Brazilian wheat cultivar Trigo BR 35, which, under the high inoculum pressure of the southern region, has been resistant to leaf rust for more than 12 years, and the susceptible cultivar IAC 13-Lo
Genetics and Molecular Biology. Publicado em: 2004