Doubled Haploids
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. 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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2. 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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3. Doubled Haploids for Studying the Inheritance of Quantitative Characters
By using a doubled-haploid population derived from F2 plants, additive and additive x additive genetic variances, as well as the number of segregating genes, can be estimated. An F2-derived doubled-haploid population may contain almost 50% more of the best recombinant than an F1-derived population. However, the best recombinant occurs in the same frequency i
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4. Association between Rdna Alleles and Quantitative Traits in Doubled Haploid Populations of Barley
Doubled haploids (DH) were generated from reciprocal F(1) hybrids which were heterozygous for alleles at the Nor-H3 locus on chromosome 5H of barley. The r-DNA alleles did not deviate significantly from the expected 1:1 ratio and the DH progenies were classified into two groups based on the allelic constitution of the Nor-H3 locus. The DHs were grown in a ra
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5. A Generalization of the Mixture Model in the Mapping of Quantitative Trait Loci for Progeny from a Biparental Cross of Inbred Lines
The recent advent of molecular markers has created a great potential for the understanding of quantitative inheritance. In parallel to rapid developments and improvements in molecular marker technologies, biometrical models have been constructed, refined and generalized for the mapping of quantitative trait loci (QTL). However, current models present restric
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6. Extraordinarily polymorphic microsatellite DNA in barley: species diversity, chromosomal locations, and population dynamics.
This study was undertaken to assess the extent of genetic variation in barley simple sequence repeats (SSRs) and to study the evolutionary dynamics of SSR alleles. SSR polymorphisms were resolved by the polymerase chain reaction with four pairs of primers. In total, 71 variants were observed in a sample of 207 accessions of wild and cultivated barley. Analys