Summary
The release of extremely early maturing varieties has made it possible to cultivate rice in Hokkaido (NL45-42°) in Japan, the northern limit region of paddy rice cultivation. Until then, rice cultivation in this region has been impracticable due to the climate condition, especially short summer and long-day more than 15 hours during summer. Experiment results confirmed that the success of rice cultivation in this area depends on raising photoperiod insensitivity varieties with short basic vegetative growth period. Moreover, in this study, the genetic factors controlling the photoperiod insensitivity of Hokkaido varieties were analyzed by using 8 kinds of tester lines for three loci, E1, E2, and E3, controlling photoperiod sensitivity. It was found out that all the varieties examined carry el, a photoperiod insensitivity allele of E1 locus, but as for the other loci, E2 and E3, the existence of plural alleles were recognized. We have already clarified that almost all the japonica-type varieties grown in Japan (except Hokkaido) and Taiwan carry E1 bringing about strong photoperiod sensitivity. Accordingly, it can be concluded that el is the gene essential to Hokkaido varieties: the interchange of E1 with e1 enabled rice cultivation under long-day condition.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Chandraratna M.F., 1953. A gene for photoperiod sensitivity in rice linked with apiculus color. Nature 171: 1162.
Hosoi N., 1981. Studies on meteorological fluctuation in the growth of rice plants. V. Regional difference of thermo-sensitivity, basic vegetative growth and factors determining the growth duration. Japan J Breed 31: 239–250.
Ichitani, K., Y. Okumoto & T. Tanisaka, 1995. Identification of the genotypes for the photoperiod sensitivity locus, Se-1, in extremely early varieties of rice. Breed Sci (in press).
Okumoto Y., T. Tanisaka & H. Yamagata, 1991. Heading-time genes of the rice varieties grown in south-west region in Japan. Japan J Breed 41: 135–152.
Okumoto Y., T. Tanisaka & H. Yamagata, 1992a. Heading-time genes of the rice varieties grown in the Tohoku-Hokuriku region in Japan. Japan J Breed 42: 121–135.
Okumoto Y., A. Yoshimura, T. Tanisaka & H. Yamagata, 1992b, Analysis of a rice variety Taichung 65 and its isogenic early-heading lines for late-heading genes E1, E2, and E3. Japan J Breed 42: 415–429.
Tanisaka T., H. Inoue, S. Uozu, & H. Yamagata, 1992. Basic vegetative growth and photoperiod sensitivity of heading-time mutants induced in rice. Japan J Breed 42: 657–668.
Tsai K.H., 1976. Studies on earliness genes in rice, with special reference to analysis of isoalleles at the E locus. Japan J Genet 51: 115–128.
Yamagata H., Y. Okumoto & T. Tanisaka, 1986. Analysis of genes controlling heading time in Japanese rice. In: Rice Genetics I, pp. 339–349, IRRI, Los Baños, Philippines.
Yokoo M. & H. Fujimaki, 1971. Tight linkage of blast-resistance with late maturity observed in different indica varieties of rice. Japan J Breed 21: 35–39.
Yokoo M., F. Kikuchi, A. Nakane & H. Fujimaki, 1980. Genetical analysis for heading time by aid of close linkage with blast resistance in rice. Bull Natl Inst Agric Sci Ser D31: 95–126.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Okumoto, Y., Ichitani, K., Inoue, H. et al. Photoperiod insensitivity gene essential to the varieties grown in the northern limit region of paddy rice (Oryza sativa L.) cultivation. Euphytica 92, 63–66 (1996). https://doi.org/10.1007/BF00022829
Issue Date:
DOI: https://doi.org/10.1007/BF00022829