CYTOGENETICS OF CROTALARIA. VII. INDUCED CYTOCHIMERAL AND ASYNAPTIC MUTANTS OF CROTALARIA /UNCEA (SUNNHEMP)

Abstract

Using gamma rays and EMS or MMS separately and in various combinations, a cytochimeral and an asynaptic mutant were isolated in Crotalaria juncea (sunnhemp). The cytochimeral mutant was characterized by the presence of both 2x and 4x chromosome numbers in the same plant, while the asynaptic mutant was characterized by the presence ofunivalents in their PMCs. Both abnormalities led to considerable sterility. The possible causes of abnormalities are discussed.