BGN 2: Desynaptic genes in barley BARLEY GENETICS NEWSLETTER, VOL. 2, II. RESEARCH NOTES
Ramage and Hernandez-Soriano, pp. 65-68

II.24. Desynaptic genes in barley.

R. T. Ramage* and Juan Hernandez-Soriano. Department of Agronomy and Plant Genetics, University of Arizona, Tucson, Arizona 85721, U.S.A.

*(Research Geneticist, Plant Science Research Division, ARS, U.S.D.A.).

Last year (Barley Genetics Newsletter 1:38) we reported finding ten desynaptic mutants in the variety Betzes (CI 6398) and that allele tests among eight of them indicated that five different loci were involved. A complete allele test among the ten Betzes mutants and the previously described desynaptic genes lc and ds has been completed. None of the ten Betzes mutants are allelic to lc or ds. The ten Betzes mutants occupy six loci. Thus, eight loci conditioning desynapsis have been identified.

We propose that the desynaptic mutants be symbolized in accordance with the rules adopted by the Eighth American Barley Research Workers Conference. They will be symbolized by the letters des to designate the character desynapsis, followed by numbers to represent the various loci, followed by letters, assigned in consecutive order, that designate the mutational events. Previously described mutational events will be arbitrarily assigned a designation regardless of priority of discovery or publication. Accordingly, the previous symbols lc and ds were changed to des1a and des2b.

Before the Betzes mutants had been assigned to loci, they were given the symbols des,,c to des,,l. In these symbols, the letters des were used to designate the character desynapsis, the two commas were used to reserve space for the locus number when determined, and the letters "c" to "l" were used to designate the particular mutational events.

Allele tests showed that des,,c is not allelic to any of the other mutants, so it was assigned to locus number 3 and symbolized des3c, The mutants des,,d and des,,h are allelic to each other and are not allelic to the other mutants. They were assigned to locus number 4 and symbolized des4d and des4h. The mutants des,,e, des,,f and des,,g are allelic to each other and are not allelic to the other mutants. They were assigned to locus number 5 and symbolized des5e, des5f and des5g. The mutants des,,i and des,,j are not allelic to each other or to the other mutants. They were assigned to locus numbers 6 and 7 and symbolized des6i and des7j. The mutants des,,k and des,,l are allelic to each other and are not allelic to the other mutants. They were assigned to locus number 8 and symbolized des8k and des8l.

Eleven additional mutants for desynapsis have been collected; one from K. J. Kasha and ten from R. F. Eslick. These have been assigned the symbols des,,m to des,,w. All of the desynaptic mutants that have been assigned symbols are listed in Table 1.

Detailed descriptions of the desynaptic mutants are being prepared for inclusion in the next issue of Barley Genetics Newsletter.

Limited amounts of seed of the desynaptic mutants listed in Table 1 are available upon request from R. T. Ramage, Agronomy and Plant Genetics Department, University of Arizona, Tucson, Arizona 85721, U.S.A.

Table 1 Desynaptic mutants in barley

1. Burnham, C. R. A gene for "long" chromosomes in barley. Genetics 31:212-213. 1946.

2. Enns, H. and E. N. Larter. Note on the inheritance of ds; a gene governing meiotic chromosome behaviour in barley. Can. J. Plant Sci. 40:570-571. 1960.

3. Enns, H. and E. N. Larter. Linkage relations of ds; a gene governing chromosome behaviour in barley and its effect on genetic recombination. Can. J. Genet. Cytol. 4:263-266. 19620

4. Eslick, R. F. Personal communication dated August, 1971.

5. Kasha, K. J. Personal communication dated January, 1972.

6. Ramage, R. T. and R. F. Eslick. Personal communication dated August, 1969.

7. Ramage, R. T. and J. Hernandez-Soriano. Desynaptic genes in Betzes barley. Barley Genetics Newsletter 1:38. 1971.

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