The transfer of triazine resistance fromBrassica napusL. toB. oleraceaL. II. Morphology, fertility and cytology of the F1hybrid

✍ Scribed by R. Ayotte; P. M. Harney; V. Souza Machado

• Publisher: Springer
• Year: 1988
• Tongue: English
• Weight: 678 KB
• Volume: 37
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00036857

✦ Synopsis

F, hybrids of triazine resistant Brassica napus and triazine susceptible B . oleracea were morphologically intermediate to the parent species . Of 49 hybrids examined, 44 had 28 chromosomes, two had 37, one had 38 and two had 56 . The 38-chromosome plant was thought to be a matromorph, the others, A,C1C (28), A1C,CC (37) or A1A1C1C1CC (56) type hybrids . Pollen stainability averaged 9 .0% in the sesquidiploid, 32.0% in the tetraploids and 89 .5% in the hexaploids . All the interspecific hybrids were resistant to 1 .0 x 10 -4 mol L -1 atrazine . The sesquidiploid hybrids produced gametes with chromosome numbers ranging from 9 to 17 and the tetraploid hybrid gametes had chromosome numbers from 15 to 22 . Most hybrids produced self-seed . The partial fertility of these hybrids may permit their backcrossing to one or both parents.