DWARFS in rice arise as mutations either spontaneous or artificially induced through
X-ray, etc. Their occurrence as spontaneous mutations has been reported by Kadam
(1932), Ramiah (1934), Piacco (1939), Dixit (1942) and Jodon and Beachell (1943),
while that through X-ray treatment has been reported by Ramiah and Parthasarathy
(1938). J odon and Beachell (1943) described four types of dwarfs and variously named
them as Thickset dwarf, Intermediate dwarf, Grassy dwarf, and Double dwarf on the basis
of their plant height and other leaf and panicle characters. The Grassy dwarf was
characterised by a large number of slender tillers, many of them failing to produce
panicles. Nagao (1951) reviewing the Japanese work on rice dwarfs has also described
four types of dwarfs, called in Japanese as Bunketsu-waitu, Ebisu dwarf, Daikokeu dwarf
and Kodaikoku dwarf, which appear to be more or less identical with the four types of
dwarfs described by Jodon and Beachell (1943).
Year: 1959
Volume: 59
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
W. T. BUTANY, R. K. BHATTACHARYYA and L. R. DAIYA info_circle