Abstract
Field hybridisation experiments are described in which B. juncea, B. napus, and B. oleracea were crossed with B. napus (male), and B. napus was crossed with B. juncea (male). Five of the experiments used chlorsulfuron herbicide‐resistant B. napus as the paternal parent, allowing over 98 000 seeds to be easily and efficiently screened for chlorsulfuron resistance to detect hybrid progeny. Two experiments used leaf morphological characters to identify putative hybrids. Intraspecific B. napus crosses produced low percentages (1.83% and 1.79%) of hybrid progeny. Brassica juncea × B. napus interspecific crosses produced on average 2.1% hybrids, and the B. napus × B. juncea cross produced 0.2% hybrids. No hybrids were detected by chlorsulfuron resistance in the B. oleracea × B. napus cross. Fecundity of the F1 hybrid plants in all of the crosses was low compared with their parents, with hybrids having less than 28% pollen stain‐ability and producing less than 2.4 seeds per flower pollinated when selfed or backcrossed; most of the F1 hybrids studied produced less than one seed per flower pollinated. These results show that low levels of hybridisation and gene transfer between B. napus and some relatives could occur in New Zealand when grown in close proximity.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.