Homozygous Lines
Mostrando 13-24 de 288 artigos, teses e dissertações.
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13. Heterosis and combining ability of sweet pepper lines with resistance to yellow mosaic caused Pepper yellow mosaic virus PepYMV. / Heterose e capacidade combinatÃria de linhagens de pimentÃo resistentes ao mosaico amarelo causado por PepYMV (Pepper yellow mosaic virus)
This paper reports on the magnitude of hetrosis, general and specific abilities in pepper hybrids, and on nature of gene action involved in expression of economic traits. Sixty-six genotypes were evaluated: five commercial hybrid checkes (Fortuna Super, Konan, Laser, Magali R and Natalie); 53 treatments composing a partial diallel cross [40 hybrids obtained
Publicado em: 2005
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14. CaracterizaÃÃo de famÃlias de alface quanto à resistÃncia aos nematÃides das galhas (Meloidogyne spp.),tolerÃncia ao pendoamento precoce e caracterÃsticas comerciais / Characterization of lettuce breeding lines with relation to resistance to root knot nematodes (Meloidugyne spp.), tolerance to bolting and commercial traits
Lettuce yeids under higt temperature have been negatively affected by tendency to carly bolting and by root knot nematodes (Meloidogyne spp.) Resistante cultivars would be a sound alternative for cultivation inder these conditions.The present paper reports on the screening of new lettuce breending lines for tolerance to early bolting, resistance to root knot
Publicado em: 2004
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15. 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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16. Computing simulation in plant breeding. / SimulaÃÃo computacional no melhoramento genÃtico de plantas
The objective of this study was to analyse three situations where the computing simulation could be useful in a plant breeding program: to get information about the number of families that must be handled to have more success in breeding. To verify if only the coefficient of variation is enough to discard experiments of Cultivation and Use Value, and to dete
Publicado em: 2004
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17. Acid phosphatase polymorphism within and among populations of Cauliflower (Brassica oleracea var botrytis)
Eighty-one lines of cauliflower (Brassica oleracea var. botrytis) from 12 populations used to produce commercial hybrids in Brazil were screened for polymorphism in the acid phosphatase system, in order to evaluate the usefulness of this marker for the determination of the parental contamination level in hybrid seeds. Little polymorphism was detected in the
Genetics and Molecular Biology. Publicado em: 2002
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18. A survey of homozygous deletions in human cancer genomes
Homozygous deletions of recessive cancer genes and fragile sites are known to occur in human cancers. We identified 281 homozygous deletions in 636 cancer cell lines. Of these deletions, 86 were homozygous deletions of known recessive cancer genes, 17 were of sequenced common fragile sites, and 178 were in genomic regions that do not overlap known recessive
National Academy of Sciences.
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19. Fitness and Density-Dependent Population Growth in DROSOPHILA MELANOGASTER
The density-dependent rates of population growth were determined for 26 populations of Drosophila melanogaster maintained in the serial transfer system. Twenty-five populations were homozygous for an entire chromosome 2 sampled from nature; the other was a random heterozygous population. Rates of population growth around the carrying capacity cannot explain
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20. Linkage Effects on Additive Genetic Variance among Homozygous Lines Arising from the Cross between Two Homozygous Parents
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21. Effects of P Element Insertions on Quantitative Traits in Drosophila Melanogaster
P element mutagenesis was used to construct 94 third chromosome lines of Drosophila melanogaster which contained on average 3.1 stable P element inserts, in an inbred host strain background previously free of P elements. The homozygous and heterozygous effects of the inserts on viability and abdominal and sternopleural bristle number were ascertained by comp
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22. Production of homozygous mutant ES cells with a single targeting construct.
We have developed a simple method for producing embryonic stem (ES) cell lines whereby both alleles have been inactivated by homologous recombination and which requires a single targeting construct. Four different ES cell lines were created that were heterozygous for genes encoding two guanine nucleotide-binding protein subunits, alpha i2 and alpha i3, T-cel
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23. The estrogen receptor locus is associated with a major gene influencing litter size in pigs.
Identification of individual major genes affecting quantitative traits in livestock species has been limited to date. By using a candidate gene approach and a divergent breed cross involving the Chinese Meishan pig, we have shown that a specific allele of the estrogen receptor (ER) locus is associated with increased litter size. Female pigs from synthetic li
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24. Homozygous deletion of the alpha- and beta 1-interferon genes in human leukemia and derived cell lines.
The loss of bands p21-22 from one chromosome 9 homologue as a consequence of a deletion of the short arm [del(9p)], unbalanced translocation, or monosomy 9 is frequently observed in the malignant cells of patients with lymphoid neoplasias, including acute lymphoblastic leukemia and non-Hodgkin lymphoma. The alpha- and beta 1-interferon genes have been assign