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Acknowledgements The author is grateful to Dr. M.S. SWAMINATHAN, Director. Indian Agricultural Research Institute for critically going through the manuscript and to Dr. H.K. JAIN, Head, Division of Genetics, I.A.R.I. for the facilities and encouragement given. Literature BELL, G.D.H., M. LUPTON and R. RILEY 1955. Investigations in the Triticinae III. The morphological and field behaviour of the A2 generation of interspecific and intergeneric amphidiploids. J. Agric. Sci. 46 : 199-231. FUKASAWA, H. 1953. Studies on restoration and substitution of nucleus of Aegilotricum I. Appearance of male sterile durum in substitution crosses. Cytologia 18 : 167-175. FUKASAWA, H. 1958. Fertility restoration of cytoplasmic male sterile emmer wheats. W.I.S. 7 : 21. KIHARA, H. 1951. Substitution of nucleus and its effects on genomic manifestations. Cytologia 16 : 177-193. KIHARA, H. 1966. Factors affecting the evolution of common wheat. Proceedings of the 3rd International Symposium. Indian J. Genet. and Pl. Breeding 26A : 14-28. KOSTOFF, D. 1937a. Studies on the polyploid plants. XI. Amphidiploid Triticum timopheevi Zhuk. x Triticum monococcum L., Z. Pflanzenz. 21 : 41-45. SCHMIDT, J.W., V.A. JOHNSON and S.S. MAAN 1962. Hybrid Wheat. Nebraska Exp. Sta. Quar. 9 (3) : 9. UPADHYA, M.D. and M.S. SWAMINATHAN 1965. Studies on the origin of Triticum zhukovskyi and on the mechanism regulating chromosome pairing in Triticum. Indian J. Genet. and Pl. Breeding 25 (1) : 1-13. WAGENAAR, E.B. 1966. Studies on the genome constitution of Triticum timopheevi Zhuk. II. The T. timopheevi complex and its origin. Evolution 20 (2) : 150-164. WILSON, J.A. and W.M. Ross 1962. Male sterility interaction of the Triticum timopheevi cytoplasm. W.I.S. 14 : 29-30. (Received June 24, 1968) |
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