Abstract
Italian and Tunisian durum wheats from different eras of breeding were assessed for the presence of a gene for brittle rachis. Nine of 15 Italian durum landraces had brittle rachides. Strampelli’s achievement was the release of the well-known variety, Senatore Cappelli, which was derived from a Tunisian landrace, Jenah Rhettifah, which has a brittle rachis. Rachides of two Tunisian landraces were also brittle. Since the 1950’s, 16 accessions were released as selections from crosses or mutagenesis involving Senatore Cappelli. Seven of these accessions have brittle rachides. F2 segregation in intercrosses of Senatore Cappelli with other durum accessions with brittle rachides indicated a common allele for brittle rachis. Segregation of the F2 from Senatore Cappelli/ANW 10A and the F2 of Senatore Cappelli/ANW 10B showed that the gene for brittle rachis of Senatore Cappelli was allelic to the brittle allele of the Br-B1 locus on chromosome 3B. Senatore Cappelli was presumably the only source of brittle rachis used in Italian breeding programmes. The genes for brittle rachis have been retained in the gene pool of durum wheat, suggesting that the brittle rachis character is not associated with an appreciable yield loss in modern farming systems in Mediterranean environments.
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References
Belay, G. & Y. Furuta, 2001. Zymogram pattern of α-amylase isozymes in Ethiopian tetraploid wheat landraces: Insight into their evolutionary history and evidence of gene flow. Genet Res Crop Evol 48: 507–512.
Kamm, A., 1974. Non-brittle types in a wild population of Triticum dicoccoides Körn in Israel. Israel J Bot 23: 43–58.
Pecetti, L., G. Boggini, M.A. Doust & P. Annicchiarico, 1996. Performance of durum wheat landraces from Jordan and Morocco in two Mediterranean environments (northern Syria and Sicily). J Genet & Breed 50: 41–46.
Pecetti, L. & P. Annicchiarico, 1998. Agronomic value and plant type of Italian durum wheat cultivars from different eras of breeding. Euphytica 99: 9–15.
Raupp, W.J., B. Friebe & B.S. Gill, 1995. Suggested guidelines for the nomenclature and abbreviation of the genetic stocks of wheat, Triticum aestivum L. em Thell., and its relatives. Wheat Inform Serv 81: 50–55.
Watanabe, N., 1994. Near-isogenic lines of durum wheat: Their development and plant characteristics. Euphytica 74: 143–147.
Watanabe, N. & N. Ikebata, 2000. The effects of homoeologous group 3 chromosomes on grain colour dependent seed dormancy and brittle rachis in tetraploid wheat. Euphytica 115: 215–220.
Watanabe, N., K. Sugiyama, Y. Yamagishi & Y. Sakata, 2002. Comparative telosomic mapping of homoeologous genes for brittle rachis in tetraploid and hexaploid wheat. Hereditas 137: 180–185.
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Watanabe, N. The occurrence and inheritance of a brittle rachis phenotype in Italian durum wheat cultivars. Euphytica 142, 247–251 (2005). https://doi.org/10.1007/s10681-005-1861-3
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DOI: https://doi.org/10.1007/s10681-005-1861-3