Genetic similarity between coriander genotypes using ISSR markers
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 un...
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Veröffentlicht in: | Horticultura brasileira 2011-12, Vol.29 (4), p.526-530 |
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Hauptverfasser: | , , , , , , |
Format: | Magazinearticle |
Sprache: | eng |
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Zusammenfassung: | 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.
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 m |
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ISSN: | 0102-0536 0102-0536 |
DOI: | 10.1590/S0102-05362011000400014 |