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Published online 22 January 2007
Published in Crop Sci 47:188-192 (2007)
© 2007 Crop Science Society of America
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CROP BREEDING & GENETICS

Genetic Analysis of Triticum compactum L. var. amplissifolium Zhuk. Producing Curved Grain

S. M. S. Tomara,*, M. K. Menonb, Vinoda, M. Sivasamyb and B. Singha

a Division of Genetics, Indian Agricultural Research Institute, New Delhi-10012, India
b IARI Regional Station, Wellington, The Nilgiris-643231, India

* Corresponding author (smstomar{at}yahoo.co.in)

The hexaploid wheat species Triticum aestivum L. ssp compactum var. amplissifolium Zhuk. produces small plump but curved or boat shaped kernels with low thousand kernel weight. The grain number per unit spike length is high. The trait curved grain seems to be rare. The genetic analysis in F2 (T. aestivum cv. NI5439 x T. amplissifolium), BC1 (F1 x NI5439) and F3 generations revealed that the curved grain is governed by a single dominant gene. The gene symbol Cvg is proposed for this trait. The curved nature of the grain could serve as a useful morphological marker. The characters short spike and kernel color are also controlled by a single but independent gene. The number of grains per unit spike length and 1000 kernel weight are presumably governed by more than one gene and both the traits showed some association with the character short spike. The linkage analysis indicated that the character curved grain is linked with short spike length and the distance between these characters is 7.63 Kosambi unit.

Abbreviations: TKW, thousand kernel weight






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