| The present study, on 100-grain weight clearly indicated that seven monosomic,
i.e. 1A, 1D, 2A, 4B, 5D, 6D and 7D increased the grain weight in variety
Mex. C.B. 116. In other variety Hira, two chromosomes 4A and 6D increased
the grain weight, whereas 4D chromosomes reduced the grain weight. All members
of homoeologous group 1, 3, 6 and 7 and chromosomes 4A, 5A and 5B have been
reported to effect the expression of grain weight by different workers,
(KUSPIRA & UNRAU 1957; LAW 1966, 1967; SASAKI et al, 1968). Taking into consideration the present observations and earlier reports on aneuploid analysis of yield and yield components, it would be evident that many chromosomes are involved and as such it may not be feasible to alter yield potentials of some selected wheat varieties by one or two chromosomes substitutions. Literature Cited BHAT, S.R. and J.V. GOUD 1979. WIS No. 50: 14-17. GARFIUS, J.F. 1959. Agron J. 51: 551-54. HERMSEN, J.G. Th. 1963. Euphytica 12: 126-129. JOSHI, B.C. and D. SINGH 1968. Indian J. Genet. 28 (1): 66-67. KOHLI, S.P. 1973. Proc. 4th Inter. Wheat Genet. Cymp. Columbia, Missouri, U.S.A. pp. 35-39. KUSPIRA, J. and J. UNRAU 1957. Can. J. Plant. Sci. 37: 300-306. LAW, C.N. 1966. Genetics 53: 487-498. LAW, C.N. 1967. Genetics 58: 445-461. PETROVIC, S. 1979. WIS No. 49: 19-23. SASAKI, M.; M. MORIYASU; R. MORRIS and J.W. SCHIMIDT 1968. Proc. 3rd Inter. Wheat Genet. Symp. (Canberra) pp. 343-349. SEARS, E.R. (1954). Missouri Agril. Exptl. Stn. Res. Bull. 572. SHARMA, D.C. and J.G. BHOWAL 1973. Z. Pflanzenzuchtg 70: 157-165. TSUNEWAKI, K. and E.G. HEYNE 1959. Genetics 44: 947-954. |
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