KARYOTYPE STUDIES ON PISUM-FULVUM AND PISUM-SATIVUM, USING A CHROMOSOME IMAGE-ANALYSIS SYSTEM

Karyotype studies were conducted on Pisum fulvum, employing traditional and image analysis methods. Meiotic data from F1 plants obtained from crosses between Pisum sativum and P. fulvum were also obtained and correlated with the karyotype data. The karyotypes of the wild species P. fulvum were different from the standard P. sativum karyotype for relative length and arm ratio of chromosomes III, V, and VII; an additional satellite is present in chromosome V and a longer satellite in chromosome VII. These chromosome differences resulted from two independent reciprocal interchanges, T(3-5) and T(1-7), which were determined by meiotic analysis of crosses made to translocation tester stocks.