Inheritance of UV-B tolerance in seven ecotypes of Arabidopsis thaliana L.Heynh. and their F-1 hybrids

Citation
J. Torabinejad et Mm. Caldwell, Inheritance of UV-B tolerance in seven ecotypes of Arabidopsis thaliana L.Heynh. and their F-1 hybrids, J HEREDITY, 91(3), 2000, pp. 228-233
Citations number
41
Categorie Soggetti
Biology,"Molecular Biology & Genetics
Journal title
JOURNAL OF HEREDITY
ISSN journal
00221503 → ACNP
Volume
91
Issue
3
Year of publication
2000
Pages
228 - 233
Database
ISI
SICI code
0022-1503(200005/06)91:3<228:IOUTIS>2.0.ZU;2-K
Abstract
We used a partial diallel mating design to examine morphologic response to supplementary ultraviolet-B (UV-B) radiation of seven ecotypes of Arabidops is thaliana L. Heynh, from several geographic locations in Europe. We were particularly interested in the inheritance of UV-B tolerance by the F-1 gen eration. Morphologic traits included plant height, rosette diameter, number of shoots (lateral branches from the rosette) and branches (lateral branch es above the rosette), and reproductive and vegetative dry mass. To effect a large difference in UV treatments, plants under treatment received 11 kJ/ m(2)/day of biologically effective UV-B radiation while control plants rece ived no UV-B radiation. Genotype effects were observed for all traits (P < .0001), but a significant treatment effect and genotype x treatment interac tions were detected only for plant height (P = .0001), rosette diameter (P = .0229), and vegetative (P = .0260) and reproductive dry mass (P = .0900), General combining ability was significant for plant height (P < .0001) and vegetative mass (P = .0563), whereas specific combining ability was signif icant for rosette diameter (P = .0220) and vegetative mass (P = .0506), The se results suggest that both pure lines and hybrids of Arabidopsis can be d eveloped for greater tolerance of UV-B radiation. Similar findings for crop species might lead to the development of UV tolerant varieties.