CHROMOSOMAL BEHAVIOR STUDIES DURING MEIOSIS: A CROSS BETWEEN Triticum timopheevi and Triticum sphaerococcum

K. BAGHYALAKSHMI¹*, R. VINOTH², V. ULAGANATHAN³, S. RAMCHANDER^4
1Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
²Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
³Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
⁴Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
* Corresponding Author : kauverik@gmail.com

Received : 02-07-2015     Accepted : 29-11-2015     Published : 14-12-2015
Volume : 7     Issue : 13       Pages : 854 - 857
Int J Agr Sci 7.13 (2015):854-857

Keywords : Chromosome, Wheat, Ploidy and interspecific crosses
Academic Editor : Subashini G., Verma Yashodhara, Alarmelu S.
Conflict of Interest : None declared
Acknowledgements/Funding : None declared
Author Contribution : None declared

Wild species of wheat belonging to different ploidy groups namely Triticum timopheevi (2n=28), and Triticum sphaerococcum (2n=42) were crossed. Very few seeds obtained from the cross between T. timopheevi as female and T. sphaerococcum as male, which were small in size and shriveled in nature. These seeds were raised and the viable hybrids were studied for their chromosomal behavior during meiosis. They showed abnormal pairing and irregular separation thus leading to sterile pollen grains. The morphology of the hybrid was almost similar to the female parent except for the dominant character like anwness, which showed pollen parent inheritance. Abnormal tetrad formation, micronuclei formation leading to polymorphic pollen grains leading to sterility was commonly observed.