CYTOGENETICAL CHARACTERISTICS OF DOUBLE MONOSOMICS OBTAINED FROM INTERCROSSES BETWEEN MONOSOMIC LINES IN KANOTA OATS

Publisher Website
Google Scholar
Abstract
To identify monosomic oats, Avena byzantina C. Koch cv. Kanota, intercrosses to produce 40-chromosome hybrids were made between 20 monosomic lines and cytogenetical characteristics of the hybrids were observed. Several monosomics, such as Mk 3, 4, 6, 9, 13 and 22 produced functional 20-chromosome pollen and 21-chromosome pollen. All plants with 40 chromosomes were double monosomics which mostly showed 19" + 2'' chromosome pairing. Monosomic parents which produced double monosomics (Mk 2 and 3; Mk 1, 2, 3, 4 and 8 and 6; Mk 4, 6 and 13 and 9; Mk 1 and 15 and 13; and Mk 20 and 22) were deficient for different chromosomes. Of the 14 kinds of double monosomics obtained from these intercrosses, 3 which were deficient for a common chromosome 9, such as 4/9, 6/9 and 13/9 showed considerable differences in seed and pollen fertilities and chromosome configurations from each other. Mk 4, 6 and 13 were deficient for functionally different chromosomes. Comparison for various characteristics between double monosomic lines which were deficient for a common chromosome was the effective method for identification of monosomic oats.

This publication has 9 references indexed in Scilit: