Allelism
Mostrando 1-12 de 86 artigos, teses e dissertações.
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1. Piramidação de genes de resistência à antracnose, ferrugem e mancha angular e estudos de alelismos em feijão comum / Pyramiding of resistance genes to anthracnose, rust and angular leaf spot and allelism studies in common bean
O objetivo deste trabalho foi obter linhagens de feijão comum do grupo comercial "carioca" com resistência às principais doenças fúngicas da parte aérea do feijoeiro. Para isso, famílias F2:3 previamente obtidas e selecionadas por apresentarem marcas moleculares relacionadas a genes de resistência à antracnose (Co-10, Co-6, Co-5 e Co-42), ferrugem (
Publicado em: 2009
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2. Identificação de novos locos de resistência à ferrugem asiática (Phakopsora pachyrhizi) em soja (Glycine max)
In Brazil, the soybean rust, caused by Phakopsora pachyrhizi, has caused yield losses and increased the cost of production by the intensive use of fungicides in soybean fields. The use of resistant varieties is an important tool to control the disease. Currently five different loci have been reported containing genes for resistance to disease, called rpp1 to
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/12/2008
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3. Allelic relationships of anthracnose (Colletotrichum lindemuthianum) resistance in the common bean (Phaseolus vulgaris L.) cultivar Michelite and the proposal of a new anthracnose resistance gene, Co-11
The genetic resistance of Phaseolus vulgaris L. cultivar Michelite to races 8 and 64 of Colletotrichum lindemuthianum, causal agent of bean anthracnose, was characterized. Crosses were made between Michelite and Mexico 222 cultivars and the F2 population was inoculated with race 64 in order to study the inheritance of resistance to anthracnose in Michelite.
Genetics and Molecular Biology. Publicado em: 2007
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4. Genome scan for QTL related to bovine resistance to Boophilus microplus / Varredura genômica para QTL associados à resistência a Boophilus microplus em bovinos
In tropical countries losses caused by bovine tick infestation have a tremendous economic impact on production systems. Genetic variation between Bos taurus and Bos indicus to tick resistance and molecular biology tools might facilitate the use of molecular markers linked to resistance traits as an auxiliary tool in selection programs. The objective of this
Publicado em: 2006
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5. Inheritance reaction in Capsicum spp. to powdery mildew (Leveillula taurica (lev.) arn.). / Herança da reação de Capsicum spp. ao oídio (Leveillula taurica (lev.) arn.).
Powdery mildew caused by the fungus Leveillula taurica, is considered the most serious greenhouse sweet pepper disease, causing losses up to 75%. Its control by fungicide is ineffective, and the best way to control would be by genetic resistance. Powdery mildew resistance sources identified in Capsicum annuum L. have been unsatisfactory because they have par
Publicado em: 2004
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6. Clan Lethals and Inter-Year Allelism in Death Valley DROSOPHILA PSEUDOOBSCURA
A chromosome 2 lethal allelism rate of about 3% was found in the 1974 population of D. pseudoobscura in Death Valley, California. This rate was significantly higher than allelism rates in other Southern California populations. The Death Valley population was sampled again in 1975 and 1977, with allelism rates of 1% and 0.5%, respectively. In 1974, several le
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7. Colonization of the Americas by Drosophila Subobscura: Lethal-Gene Allelism and Association with Chromosomal Arrangements
Drosophila subobscura is a Palearctic species that has recently colonized the Americas. It was first found in 1978 in Puerto Montt, Chile, and in 1982 in Port Townsend, WA. The colonization and rapid expansion of the species in western South and North America provides distinctive opportunities for investigating the process of evolution in action. The inversi
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8. The Frequency and Allelism of Lethal Chromosomes in Isolated Desert Populations of DROSOPHILA PSEUDOOBSCURA
Second-chromosome lethals were extracted from four populations of Drosophila pseudoobscura in Southern California. Two of the populations were from desert oases and two from the classic habitat on Mt. San Jacinto, previously studied by Dobzhansky. Allelism tests were made on the lethals within and between all locations. The frequency of lethal second-chromos
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9. Population Genetics of an Expanding Family of Mobile Genetic Elements
A model of an expanding family of dispersed repetitive DNA was studied. Based on the previous result of the model of duplicative transposition, an approximate solution to give allelism and identity coefficients as functions of time was obtained, and theoretical predictions were verified by Monte Carlo experiments. The results show that, even if the copy numb
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10. Gene Flow in Natural Populations of DROSOPHILA MELANOGASTER with Special Reference to Lethal Allelism Rates and Protein Variation
A simultaneous survey of 14 protein loci, together with frequencies and within- and between-population allelism rates of lethal chromosomes, was carried out in five (four Japanese and one Korean) natural populations and one cage population of Drosophila melanogaster. It was found that lethal allelism rates decrease rapidly as geographic distance between two
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11. The Timing of Mu Activity in Maize
The timing of mutator activity of Mu in maize was tested in three ways: (1) by allelism tests of phenotypically similar male-transmitted mutants, (2) by studying the clustering of phenotypically similar mutants as demonstrated by ear maps and the subsequent allelism tests of these mutants, and (3) by the induction of somatic sectors in Mu plants heterozygous
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12. Tests for Allelism among Auxotrophs of Salmonella Typhimurium