Indian Society of Genetics & Plant Breeding

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PHENOTYPIC EXPRESSION OF INDUCED GRASS-CLUMP CHARACTER IN WHEAT UNDER DIFFERENT ENVIRONMENTS

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EVER since Farrer (1898) reported the occurrence of grass-clumps in wheat,
several workers have studied the genetics of this character (MacMillan, 1937;
Kihara, 1938; Morrison, 1957 and Ahluwalia and Sikka, 1962). The complex
nature of the occurrence of grass-clumps in the form of dwarfs, semi-lethals and
lethals in wheat with different intensity, is not clearly understood. The problem
is all the more baffling, as some of the grass-clumps (reported in intervarietal
crosses or radiation-induced) remain sterile while others may flower and produce
side tillers profusely. In induced mutation studies in wheat, several dwarfs
of the grass-clump type were observed, and their frequency was higher in the
M
2 material of the variety Ridley, screened at Bhowali in the Kumaon hills
than that at Delhi. Hence, cytological studies of these mutants was undertaken
and the data are presented in this paper.
  

Info

Year: 1966
Volume: 26
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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