Isoenzymatic variability in wild potatoes

Pesquisa Agropecuária Brasileira

Beatriz Helena Gomes Rocha²  Eliane Augustin¹  João Baptista Da Silva²  Judith Viégas² 

[1] ,Universidade Federal de Pelotas Departamento de Ciência e Tecnologia de Sementes Capão do Leão RS

关键词: peroxidases;    aminotransferases;    isomerases;    isocitrate dehydrogenase;    genetic variation;    peroxidase;    aminotransferase;    isomerase;    isocitrato desidrogenase;    variação genética;   

DOI  :  10.1590/S0100-204X2001000500008

来源: SciELO

【 摘 要 】

Two species of wild potato Solanum commersonii, subspecies commersonii and malmeanum, and S. chacoense, subspecies muelleri occur in southern Brazil. Their rusticity and easy adaptation to extreme climatic conditions make them valuable for breeding programs. The objective of this work was to analyze the isoenzymatic variability of 113 clones of wild potato subspecies. They were collected and maintained at Embrapa-Centro de Pesquisa Agropecuária de Clima Temperado, at Pelotas, RS, Brazil. Enzymes involved in energetic (group I) or in peripherical (group II) metabolism constituted the material used. Polyacrylamide horizontal gel electrophoresis was used to analyze peroxidase, aspartate transaminase, phosphoglucomutase and isocitrate dehydrogenase isoenzymes. Solanum spp. has considerable genetic variability for isoenzymatic patterns. Cluster analysis classified the clones into 51 subgroups, based on electrophoretic variants of group I enzymes, and into 89, when group II enzyme variants were added. Genotypic differentiation of S. chacoense muelleri in relation to S. commersonii commersonii and S. commersonii malmeanum is evident when expressed through similarity and cluster analysis.

【 授权许可】

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