|
Towards the development of a Cavendish banana resistant to race 4 of fusarium wilt: gamma irradiation of micropropagated Dwarf Parfitt (Musa spp., AAA group, Cavendish subgroup)
M. K.
Smith A E,
S. D.
Hamill A,
P. W.
Langdon B,
J. E.
Giles C,
V. J.
Doogan C,
K. G.
Pegg D
A
Department of Primary Industries and Fisheries Queensland, Maroochy Research Station, PO Box 5083, SCMC, Nambour, Qld 4560, Australia.
B
Department of Primary Industries and Fisheries Queensland, South Johnstone Research Station, PO Box 20, South Johnstone, Qld 4859, Australia.
C
Department of Primary Industries and Fisheries Queensland, Locked Mail Bag 4, Yeerongpilly, Qld 4105, Australia.
D
Department of Primary Industries and Fisheries Queensland, 80 Meiers Road, Indooroopilly, Qld 4068, Australia.
E
Corresponding author. Email: mike.smith@dpi.qld.gov.au
|  |
|
Australian Journal of Experimental Agriculture 46(1) 107–113 http://dx.doi.org/10.1071/EA04175
Submitted: 16 August 2004
Accepted: 23 December 2004
Published online: 9 February 2006
Abstract
‘Dwarf Parfitt’, an extra-dwarf Cavendish cultivar with resistance to subtropical race 4 Fusarium oxysporum f. sp. cubense (Foc), was gamma irradiated at a dose of 20 Gy and putative mutants were recovered with improved agronomic characteristics. Further screening of putative mutants for improved yield and fruit size, as well as a degree of resistance to fusarium wilt, led to the selection of a line (DPM25) with improved productivity when grown on soils infested with subtropical race 4 Foc. DPM25 was equal to the industry standard, ‘Williams’, in every agronomic trait measured and it consistently showed a lower incidence of fusarium wilt. Further improvement of field resistance to race 4 Foc is needed in DPM25 and further cycles of mutation induction and selection is an option discussed.
Keywords:
mutation breeding, somaclonal variation, tissue culture.
|
|
|
 |
Subscriber Login |
 |
|
Early Alert
Connect with us
