Phenotypic polymorphism of six enzymes in the grasspea (Lathyrus sativus L.) |
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Authors: | A. G. Yunus M. T. Jackson Janet P. Catty |
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Affiliation: | (1) School of Biological Sciences, The University of Birmingham, Edgbaston, B15 2TT Birmingham, UK;(2) Present address: Farm Office, University of Agriculture, 43400 Serdang, Selangor, Malaysia;(3) International Rice Research Institute, P.O. Box 933, 1099 Manila, Philippines |
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Abstract: | Summary The phenotype variation in six enzymes, 6-phosphogluconate dehydrogenase (6-PGD), malate dehydrogenase (MDH), peroxidase (PRX), isocitrate dehydrogenase (IDH), galactose dehydrogenase (GD) and glutamate oxaloacetate transaminase (GOT), was investigated using horizontal starch gel electrophoresis in 52 accessions of the grasspea, Lathyrus sativus. Phenotypic polymorphism was observed for all six enzymes. High phenotypic polymorphism (Pj) was observed for PRX and 6-PGD, while there was little polymorphism for GOT, with only two accessions showing variation. There was no correlation between phenotypic polymorphism and region of origin, or groupings of accessions made on the basis of flower colour. Tentative genetic interpretations of banding patterns are given for five of the enzyme systems. The level of apparent heterozygosity was higher than expected in this predominantly autogamous species. The level of variation in the grasspea is discussed in terms of its potential for exploitation through plant breeding. |
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Keywords: | Lathyrus sativus grasspea isozyme phenotype phenotypic polymorphism genetic diversity genetic resources |
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