BGN 20: Allelic and maternal studies of several chlorophyll mutants in barley

Allelic and maternal studies of several chlorophyll mutants in barley

S. Wang and T. Tsuchiya
Department of Agronomy
Colorado State University (CSU)
Fort Collins, Colorado 80523, U.S.A.

In the collection of barley genetic stocks in the World Barley Genetic Stock Center, Fort Collins, Colorado, many chlorophyll mutants showed similar characteristics. Reciprocal crosses were made between these similar mutant types. At the same time, several chlorina mutants were crossed with SEl6 with normal green seedling color to test their maternal nature of inheritance. The F₁ results are listed in Tables 1 and 2.

Table 1. Genetic analysis of chlorina mutants in barley, maternal test

Table 2. Phenotypes of F₁ hybrids from reciprocal crosses with different chlorina mutants of CSU barley genetic stocks.

The results in Table 1 suggested that all these three mutants tested are not maternally inherited. The results in Table 2 are summarized as follows:

Allelic groups:

B9-8 and B9-6
B11-2 and B11-7
B5-1 and B11-10
B15-7 and B3-2

Non-allelic groups:

B2-4 and B3-2
B13-2 and B14-6

Genetic Stocks B9-8, B11-2, B11-7, B11-10, and B2-4 have been reported that they were not maternally inherited (Hang and Tsuchiya, 1989; Tsuchiya et al., 1990). So the results in Table 2 suggested that B9-6, B5-1, and B3-2 could not be maternally inherited. The maternal nature of B15-7, B13-2, and B14-6 could not be concluded from this study. The allelic relation between B15-7 and B3-2 also needs further investigation.

References:

Hang, A., and T. Tsuchiya. 1989. Genetic analysis of three chlorina mutants in barley. BGN 19:22-23.

Tsuchiya, T., S. Wang, and A. Hang. 1990. Genetic analysis of chlorophyll mutants in the barley genetic stock center. 14th American Barley Researchers Workshop, Barley Newsl. 33:105.

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