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Immature sunflower (Helianthus annuus L.) zygotic embryos of sunflower double haploid fertility restorer line 381 R were treated with ultrasound before planting to embryo culture medium. Some mutant plants were isolated and self-pollinated for several generations. New sunflower forms with inherited morphological, biochemical and phytopathological changes were obtained through selection and self-pollination. The genetic changes included 12 morphological and biochemical agronomic traits. In our study the plant height, leaf petiole length, 1000-seed weigh, as well as oil content in them were most unstable, based on all investigated characteristics. In comparison to the control 381 R, decreasing in the mean value of the indexes was registered for 66.7% of the total number of characteristics and vice verse, significant increasing for the number of branches and oil content in seed i.e., 16.7%. Stability after induced mutagenesis was demonstrated by the characteristic number of leaves. This index was not affected by the changes in climatic conditions. Mutation for resistance to Plasmopara halstedii (Farl.) was obtained from the susceptible Bulgarian control line 381 R. Reduction of plant

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Author

J. Encheva; P. Shindrova

Publisher

National Library of Serbia

Published

2011

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)