@article{oai:ir.kagoshima-u.ac.jp:00000894,
 author = {NAKAGAMA, Akinori and KATAYAMA, Tadao C.},
 journal = {南太平洋海域調査研究報告=Occasional papers},
 month = {2016-10-27},
 note = {Using 110 strains of Oryza sativa L. and 78 strains of Oryza glaberrima STEUD. collected in 5 African countries, i.e., Madagascar, Kenya, Nigeria, Liberia and Senegal including Gambia, in 1984 and 1985, interspecific difference, intraspecific variation, and geographical distribution on grain-type of unhusked grain were investigated.
The results obtained were as follows.
1. O.glaberrima was shorter in grain-length, and wider in grain-width, than those of
O.sativa, respectively. In both characters, O.glaberrima were less variable than those
of O.sativa. In both species, regional differences on grain-length and grain-width were remarkably observed.
2. Though, no difference of product of grain-length and grain-width (grain-size) between O.sativa and O.glaberrima was found, ratio of grain-length to grain-width (grain-shape)
in O.glaberrima was smaller than that of O.sativa. Grain-shape in O.glaberrima
were less diverse than those in O.sativa. In both species, regional differences on these
components were observed.
3. In O.sativa, strains collected in traditional habitats, i.e., deep water condition, river-flooded plain, upland field and depression, looked more roundish in grain-shape and larger in grain-size, respectively. While, strains collected in irrigated paddy field and
rain-fed paddy field looked more slender in grain-shape and smaller in grain-size, respectively. Variations of both components were obviously small in strains collected in the deep water condition and large in strains collected in the rain-fed paddy field, respectively. In O.glaberrima, grain-sizes were clearly large in strains collected in river-flooded plain and small in strains collected in the upland field and the wild status. The grain-shapes were generally roundish, but, the grain-shapes of strains collected in upland field and wild status were more slender.},
 pages = {201--209},
 title = {Geographical Distribution and Grain-Type of Cultivated Rice, Oryza sativa L. and Oryza glaberrima STEUD., in Africa},
 volume = {18},
 year = {}
}