9 research outputs found

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    Not AvailableSegregating populations (F3) of two crosses involving two high yielding varieties - JS335 and JS9305 (both susceptible to rust) and one germplasm line EC241780 (resistant to rust) were screened through artificial inoculation for resistance to soybean rust. Six among the 62 progeny lines were resistant or moderately resistant to rust. The selected lines had yield level at par with JS335 and/or JS9305. Significant genetic variations were observed in the progeny lines for yield and other yield attributing characters except pod length and number of seeds per pod. The differences between phenotypic and genotypic coefficient of variations for the characters were narrow. High estimates of heritability coupled with high genetic advances were recorded for a number of traits. Positive and significant phenotypic correlation of seed yield was observed with number of branches per plant, pods per plant, pod weight, number of seeds per plant, biomass and harvest index. The identified lines will be the primer for developing improved soybean genotypes with resistance to rust disease.Not Availabl

    Genetic similarity between coriander genotypes using ISSR markers Similaridade genética entre genótipos de coentro por marcadores ISSR

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    With the development of new cultivars, a precise genetic characterization is essential for improvement programs or for cultivar registration and protection. Molecular markers have been complementing the traditional morphological and agronomic characterization techniques because they are virtually unlimited, cover the whole genome and are not environmentally influenced. Genetic characterization constitutes the basis for studies involving estimates of genetic similarity. Therefore, the objective of the present study was to evaluate the genetic similarity between ten coriander genotypes (nine cultivars and one line) using ISSR markers. The cultivars used were: Americano, Asteca, Palmeira, Português, Santo, Supéria, Tabocas, Tapacurá, Verdão and the experimental line HTV-9299. The genetic similarity between the cultivars was estimated using 227 banded regions of ISSR molecular markers. The UBC 897 oligonucleotide generated the highest number of fragments (16), resulting in a higher polymorphism. The results indicate that the twenty-nine oligonucleotides chosen were satisfactory for detecting polymorphism. Based on the grouping analysis determined from the similarity data, there were two groups and two sub-groups. The calculated similarity for the genotypes varied from 52 to 75%. The lowest similarity was observed between Português and Verdão, at 52%. The highest similarity was found between Português and Palmeira, at 75%. The ISSR is efficient for identifying DNA polymorphism in coriander.<br>Com o surgimento de novas cultivares, uma caracterização genética precisa é essencial, visando à utilização em programas de melhoramento ou para fins de registros e ou proteção de cultivares. Marcadores moleculares vêm complementando a caracterização morfológica e agronômica tradicional, uma vez que são virtualmente ilimitados, cobrem todo o genoma e não são influenciados pelo ambiente. A caracterização genética constitui a base para trabalhos de estimativas de similaridade genética. Portanto, este trabalho teve como objetivo avaliar a similaridade genética entre dez genótipos de coentro (nove cultivares e uma linhagem) por meio de marcadores ISSR. As cultivares utilizadas foram Americano, Asteca, Palmeira, Português, Santo, Supéria, Tabocas, Tapacurá, Verdão e a linhagem experimental HTV-9299. A similaridade genética entre as cultivares foi estimada com base nos marcadores moleculares de ISSR, utilizando-se 227 regiões de bandas de ISSR. O oligonucleotídeo UBC 897 gerou o maior número de fragmentos (16), resultando em um maior polimorfismo. Os resultados indicam que os vinte e nove oligonucleotídeos escolhidos foram satisfatórios para detecção de polimorfismo. Como resultado da análise de agrupamento a partir dos dados de similaridade, verificou-se a presença de dois grupos e dois subgrupos. A similaridade calculada para os genótipos variou de 52 a 75%. A menor similaridade ficou entre Português e Verdão, com 52%. Já a maior similaridade foi obtida entre Português e Palmeira com 75%. O ISSR é eficiente na identificação de polimorfismo de DNA em coentro

    Growth Factor Delivery Matrices for Cardiovascular Regeneration

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