BGN 7: The genetic male sterile barley collection BARLEY GENETICS NEWSLETTER, VOL. 7, IV. REPORTS FROM COORDINATORS
Hockett, pp. 97-100

IV. 12. The genetic male sterile barley collection.

E. A. Hockett. Western Region, ARS, USDA and Plant and Soil Science Department, Montana State University, Bozeman, MT 59715. U.S.A.

The 1975 report (BGN 6:108) contains a typographical error in Table 1. The symbol for CI 13641 HB421/78 reads msg7ak and should read msg7ah. This error is corrected in Table 2 of this 1976 report.

Two new numbered loci have been assigned to the genetic male-sterile series as shown in Table 1. These results of crossing a homozygous male-sterile plant with a heterozygous male-sterile plant of the previously numbered loci, show that msg27ae and msg28as are not allelic with msg1 through msg25 or with each other. Some of the data for the allelism tests for msg27ae are taken from (4), and for msg28as from (3).

Table 2 gives the data for three mutants found to be allelic with previously numbered male-sterile loci.

The only new symbol assigned since last year's report is msg,,do (Table 3). This mutant from Maris Baldric is the same one studied by Kasembe (2). Several of the mutants reported on in my 1974 Coordinator's report (BGN 5:84-86) did not fit a 3:1 segregation ratio for fertile: sterile plants in the F2. Additional data for these mutants, msg,,cy, msg,,de, msg,,df, msg,,di, and msg,,dj in Table 3 indicates the fit to a 3:1 ratio is still unsatisfactory for msg,,cy and msg,,df since there is a shortage of male-sterile plants. Bozeman, 1976 data is reported for the other four mutants in Table 3. The msg,,dm and msg,,da mutants are also discussed by Ahokas (1). Since only one selfed seed was found in each of these two mutants, the possibility of these two seeds being outcrosses will be tested in 1977.

Table 1. Ratios of fertile to male sterile F1 plants from crosses of genes determined to be nonallelic. (1)

Table 2. Ratios of fertile to male sterile F1 plants from crosses of genes determined to be allelic.

Table 3. Ratios of fertile to sterile plants in F2 and selfing behavior of sterile plants at Bozeman, Montana in 1976

References:

Ahokas, H. 1976. Male sterile mutants of barley. III. Additional inaperturate mutants. Barley Gen. Newsletter 6:4-6.

Kasembe, J. N. R. 1967. Phenotypic restoration of fertility in a male sterile mutant by treatment with gibberellic acid. Nature 215:668.

Sharma, R. K. 1970. Studies of sterility mutants in spring barley (Hordeum vulgare L.) Ph.D. Thesis University of Guelph. 81 p. Guelph, Ontario.

Somnus, P. 1968. Allelism of a male-sterile gene in barley. M.S. Thesis, Colorado State University. 32 p. Fort Collins, CO.

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