Abstract
SUMMARYAt meiosis in Brassica oleracea (cabbage and Brussels sprout), B. pekinensis and the related Sinapis arvensis and Eruca sativa, multivalents were common and numerous secondary associations of bivalents were detectable in all species from diplotene into metaphase. Quadrivalent formation in cabbage and Brussels sprouts usually involved an increase in chiasma frequency per cell and there is evidence that the potential quadrivalent frequency is limited, at least partly, by limited chiasma formation. Secondary associations are thought to represent lapsed multivalents. Extensive duplication of chromosomes (or of large chromosome segments), is therefore implied, and polysomic rather than diploid breeding behaviour should be expected for many gene loci.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
