Haploids
Mostrando 1-12 de 109 artigos, teses e dissertações.
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1. Haploid identification using tropicalized haploid inducer progenies in maize
Abstract The aim of this study was to identify maize haploid plants and compare the efficiency of identification of maize haploid plants using the R1-nj morphological marker, plant vigor, flow cytometry, chromosome counting, and microsatellite molecular markers under tropical conditions. We also established a protocol for chromosome duplication in maize hapl
Crop Breed. Appl. Biotechnol.. Publicado em: 2018-03
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2. Diversidade genética de isolados do fungo Sporisorium scitamineum analisada através de fingerprinting da região telomérica / Genetic diversity of isolates of the fungus Sporisorium scitamineum analyzed by fingerprinting the telomeric region
The genetic diversity of Sporisorium scitamineum, the sugarcane smut agent, was characterized in a 14 isolates collection. The isolates were obtained from various sugarcane growing areas and RFLP of the telomeric region was used as molecular marker, compared with AFLP. Teliospores were collected from the whip of infected plants. Teliospores are diploids and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/09/2012
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3. 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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4. 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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5. InduÃÃo de calos e embriogÃnese em anteras de Coffea arabica L. / Induction of anther calli and embryogenesis in Coffea arabica L.
Coffee breeding through convention methods, especially hybridization, followed by population selection, progeny evaluation, back-crossings and inter-specific crossings is a time consuming process that can demand for more than 30 years to obtain a new cultivar. It is possible to reduce this time by producing homozygous lines, from di-haploids, obtained from a
Publicado em: 2007
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6. Calogênese em anteras e diversidade genética de acessos de pimenta (Capsicum spp.) do banco de Germoplasma da Universidade Federal de Roraima com base em Marcador RAPD
The objective of this work was to analyze the adrogenesis in two pepper accessions, accession 43 - Capsicum annuum and access 40 - C. chinense, by the anther culture aiming to regenerate of haploids plants, to correlate the size of the bud with the development stadium of the of microscope and to evaluate the genetic diversity of 29 pepper accessions of Germo
Publicado em: 2006
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7. 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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8. Castor bean (Ricinus communis l.): cultura de antera, pollen viability and conservation / Mamona (Ricinus communis L.): cultura de antera, viabilidade e conservação de pólen
A mamona (Ricinus communis L.) apresenta diversas aplicações econômicas, entre elas, destaca-se a produção do óleo indicado como matéria prima para produção de Biodiesel. Na tentativa de conservar e caracterizar as variedades de mamona a análise de fertilidade torna-se de grande importância para dimensionar a heterogeneidade destas cultivares e co
Publicado em: 2006
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9. 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
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10. Analise genetica da produção de lipidios de aspergillus nidulans
Three auxotrophics mutants of A.nidulans were crossed among themselves as result we obtained three diploids. From the diploid MSE // pro A1; paba A6; y A1 were obtained nine sectors by haploidization. The haploids strains were cultivated in a complete medium and in a minimum supplemented medium. The diploids were grown in a minimum and the segregates grew in
Publicado em: 1989
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11. Doubled Haploids for Estimating Mean and Variance of Recombination Values
In a diallel cross analysis using doubled haploids, both additive and additive x additive genetic variances can be estimated. In addition, mean and variance of recombination values can also be estimated. Linkage affects the covariance between half-sibs the most, the covariance between grandparent and grand offspring to an intermediate degree and the covarian
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12. Genetic complementation in Cryptococcus neoformans.
A complementation test was devised for the fungus Cryptococcus neoformans. Complementation was signalled by the growth of prototrophic heterokaryons generated in crosses of the type aB X Ab, where a and b represent any two of the genetic markers ilv1, cys1, cys2, and cys3. The cloned complementing heterokaryons formed characteristic hyphal colonies that cont