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Isoenzyme Variation in Asian Beans
Author(s) -
Jaaska Velio,
Jaaska Vilve
Publication year - 1990
Publication title -
botanica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0932-8629
DOI - 10.1111/j.1438-8677.1990.tb00162.x
Subject(s) - subgenus , biology , vigna , monophyly , isozyme , intraspecific competition , botany , radiata , genus , genetic variation , phylogenetic tree , zoology , gene , genetics , enzyme , biochemistry , clade
Electrophoretic variation of isoenzyme characters encoded by 20 gene loci has been studied in 9 species of Asian beans, comprising subgenus Ceratotropis of the genus Vigna . Four species of hypogeal germination type, V. angularis, V. umbellata, V. dalzelliana and V. minima , are shown to form a distinct monophyletic group in the subgenus, sharing common electromorphs of two major isoenzymes of aspartate aminotransferase. V. glabrescens is confirmed to be an allotetraploid derivate of two diploids closely related to V. radiata and V. umbellata , but divergent from their contemporary accessions analyzed. V. trilobata is the most variable species of the subgenus in isoenzyme characters. It reveals intraspecific differentiation at several isoenzyme loci correlated with the seed morphology and geographical localization.