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Genetic study of resistance to inhibitory effects of UV radiation in rice (Oryza sativa)
- Source :
- Physiologia Plantarum. 91:234-238
- Publication Year :
- 1994
- Publisher :
- Wiley, 1994.
-
Abstract
- Genetic analysis of resistance to the inhibitory effects of UV radiation on growth of rice (Oryza sativa L.) cultivars was carried out. Some experimental plants were grown in visible radiation supplemented with UV radiation containing a large amount of UV-B and a small amount of UV-C in a phytotron, while others were grown without UV radiation. The degree of resistance to UV radiation was estimated in terms of the degree of reduction caused by supplemental UV radiation in the fresh weight of the aboveground plant parts and the chlorophyll content per unit fresh weight. Fresh weight and chlorophyll content in F2 plants generated by reciprocally crossing cv. Sasanishiki, a cultivar more resistant to UV radiation, and Norin 1, a cultivar less resistant to such radiation exhibited a normal frequency distribution. The heritabilities of these two properties in F2 plants were low under conditions of non-supplemental UV radiation. Under elevated UV radiation, the F2 population shifted to the lower range of fresh weight and chlorophyll content, and the means were close to those of Norin 1. The heritabilities of these two properties were the same in the reciprocal crosses, indicating that maternal inheritance was not involved. Inheritance of chlorophyll content per unit fresh weight was further determined in F3 lines generated by self-fertilizing F2 plants of Sasanishiki and Norin 1. The results showed that the F3 population was segregated into three genotypes, namely, resistant homozygotes, segregated heterozygotes and sensitive homozygotes, with a ratio of 1:65:16. It was thus evident that the resistance to the inhibitory effect of elevated UV radiation in these rice plants was controlled by recessive polygenes.
- Subjects :
- education.field_of_study
Oryza sativa
Physiology
Population
Environmental factor
food and beverages
Cell Biology
Plant Science
General Medicine
Biology
medicine.disease_cause
Horticulture
chemistry.chemical_compound
chemistry
Polygene
Phytotron
Chlorophyll
Botany
medicine
Genetics
Poaceae
Cultivar
education
Subjects
Details
- ISSN :
- 13993054 and 00319317
- Volume :
- 91
- Database :
- OpenAIRE
- Journal :
- Physiologia Plantarum
- Accession number :
- edsair.doi.dedup.....d4235205e60f8edb8cd6136326fa7f87