Youki Itoh

Characterization of Heading Times and Duration of Heading Time of an Individual Using a Wide Range of Variety of Rice (Oryza sativa L.) in One of the Northern-limit Regions of Rice Cultivation, Hokkaido Islands

Youki Itoh · Journal of Agriculture and Ecology Research International · 2018

Aims: Hokkaido islands are one of northern limit regions of rice cultivation. There is about 170-year history about cultivation and breeding of Hokkaido rice and the history was well described in Japanese. Hence, cultivation and breeding of rice in Hokkaido islands can be a model...

Open access Research Article 10.9734/JAERI/2016/27210

Effects of the Two-early-flowering-time Genes, Ef1 and m-Ef1, Founded in Low Latitude were Reexamined in One of the Origins of Donor Parent under Fluctuating Field Environments as to Earliness Effect and Fitness

Youki Itoh · Journal of Agriculture and Ecology Research International · 2015

Aims: Early flowering 1 (Ef1) and modifier of Early flowering 1 (m-Ef1) genes were firstly detected in the cultivars fitted to northern margins of rice cultivation. Hence, it has been inferred that the genes might be essential for adaptation to the regions. However, the genes hav...

Open access Research Article 10.9734/JAERI/2015/18360