Abstract
Two off-type plants, morphologically distinguishable from each other and from their respective sister euploid, were isolated in the M3 generation of pea interchange heterozygotes. Pollen sterility was very high, ranging from 63.0 to 90.0%. Cytologically one of them was tetrasomic (2n+2=16) and the other one was quadruple trisomic (2n+1+1+1+1=18). In the tetrasomic plant 1IV+6II was the most frequent (46.7%) chromosome configuration, while cells with 4III+3II were predominant (40.0% cells) in the quadruple trisomic plant.
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