Journal Article

Brief communication. Tetraploid nature of <i>Sorghum bicolor</i> (L.) Moench

MI Gomez, MN Islam-Faridi, MS Zwick, DG Czeschin, GE Hart, RA Wing, DM Stelly and HJ Price

in Journal of Heredity

Published on behalf of American Genetic Association

Volume 89, issue 2, pages 188-190
Published in print March 1998 | ISSN: 0022-1503
Published online March 1998 | e-ISSN: 1465-7333 | DOI: http://dx.doi.org/10.1093/jhered/89.2.188
Brief communication. Tetraploid nature of Sorghum bicolor (L.) Moench

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The advent of bacterial artificial chromosomes (BACs) and development of high quality methods for fluorescent in situ hybridization (FISH) to plant chromosomes offer revolutionary tools for plant genome analysis. We discovered a 45 kb sorghum BAC (22B2) that differentially hybridizes to centromere regions of 10 of the 20 chromosomes of sorghum (Sorghum bicolor. Moreover, hybridization of this BAC to plants trisomic (2n = 20 + 1) for the five available trisomes identified their respective subgenomic affiliations. Plants trisomic for chromosomes E, H, and I displayed 11 signals. The results provide strong evidence that sorghum is at least of tetraploid origin, and that there are two subgenomes of five chromosomes each in the S. bicolor genome.

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Subjects: Genetics and Genomics

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