CYTOGENETIC STUDIES IN<i>ARABIDOPSIS THALIANA</i>

Abstract

The five primary trisomics and one telotrisomic of Arabidopsis have been established and identified with respect to known linkage groups. From diplotene preparations the chromosome complement was seen to comprise one long, three medium, and one short chromosome. All the trisomics except Fragilis were transmitted through the male (in frequencies up to 22%). There appears to be some selection against disomic eggs, only 21-30% recovery being observed from selfed trisomics. No tetrasomics were found.