In barley, 12 mutants have been given the gene symbol of f, (f, f_c, f2 - f11), for their chlorina genetic nature, and all the genes have been assigned to respective chromosome/linkage groups (Shahla and Tsuchiya, 1990). In our barley germplasm collection B series, almost 30% of the 250 plus stocks are the chlorophyll mutants, among which chlorina mutants are the majority. In order to determine the allelic relationship between these chlorina mutants and established f series, and the maternal nature of these chlorina stock all these chlorina mutants were germinated and transplanted at the same time as all f series stocks. Plant seedlings were observed carefully. Reciprocal crosses were made between new mutants and f series stocks. The results are listed in Table 1.

The results in Table 1 were summarized as follows:

Allelic groups:

B14-2 and B10-4 f
B11-4 and B3-12 f_c
B15-6 and B3-12 f_c

Non-allelic groups:

B13-10 and T18-16 f3
B10-11 and T8-15 f5
B13-11 and B1-10 f7
B13-8 and B1-10 f7

Since the all established f series mutants are not maternally inherited, all the mutants in Table 1 should not be maternally inherited except B11-4 and B15-6. For B11-4 and B15-6, their maternal effect is not known and is being tested. Since their reciprocal crosses were not complete, their allelic relation with f_cneeds to be confirmed based on whether they are maternally inherited or not.

Reference:

Shahla, A., and T. Tsuchiya. 1990. Genetic analysis in six telo-trisomic lines in barley (Hordeum vulgare L.) J. Hered. 81:127-130.