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Photoperiod insensitivity gene essential to the varieties grown in the northern limit region of paddy rice (Oryza sativa L.) cultivation by Yutaka Okumoto; Katsuyuki Ichitani; Hiromo Inoue; Takatoshi Tanisaka is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Photoperiod insensitivity gene essential to the varieties grown in the northern limit region of paddy rice (Oryza sativa L.) cultivation about?

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, El, E2, and E3, controlling photoperiod sensitivity . It was found out that all the varieties examined carry el, a photoperiod insensitivity allele of El 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 El bringing about strong photoperiod sensitivity . Accordingly, it can be concluded that el is the gene essential to Hokkaido varieties

Who reads Photoperiod insensitivity gene essential to the varieties grown in the northern limit region of paddy rice (Oryza sativa L.) cultivation?

Author

Yutaka Okumoto; Katsuyuki Ichitani; Hiromo Inoue; Takatoshi Tanisaka

Publisher

Springer; Springer-Verlag; Kluwer Academic Publishers; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0014-2336)

Published

1996

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)