GENETICS AND CYTOLOGY OF MALE STERILITY IN PEAS

60 PNL Volume 16 1984

RESEARCH REPORTS

Myers, J. R. and E. T. Gritton Department of Agronomy

University of Wisconsin, Madison, WI USA

Fourteen male sterile pea mutants have been studied during the past

four years. These mutants were maintained through segregating families

because of their low degree of self-fertility. Tests of allelism

demonstrated that several mutants from different sources are allelic.

The data indicate that G.71A (ms-2) and G.98 (ms-4) are conditioned by

the same gene. Since these gene symbols have been previously assigned,

ms^_2 should be considered the valid symbol with ms-4 as a synonym. We

were unable to test for allelism with ms-1 because this gene is extinct.

In all, ten unique genes have been distinguished and are shown in

Table 1. All are conditioned by homozygous recessive alleles at a

single locus and linkage relations have been determined for most genes.

Cytology of ms-2 and ms-3 has been studied by Gottschalk and col-

leagues (1-5). Among the other male steriles, ms-6 and ms-10 exhibited

meiotic abnormalities. The remaining male steriles degenerated after

meiosis (Table 2). Both ms-3 and ms-10 showed a high degree of female

sterility. All other male steriles possessed normal female fertility.

It Gottschalk, W. and S. R. Baquar. 1972. Cytoblolgie 5:42-50.

2. Gottschalk, W. and A. Jahn. 1964. Z. Vererbungsl. 95:150-167.

3. Gottschalk, W. and M. L. H. Kaul. 1974. Nucleus 17:133-166.

4. Gottschalk, W. and H. D. Klein. 1 9 76 . Theor . Appl. Genet.

48:23-34.

5. Klein, H. D. 1969. Nucleus 12:167-172.

6. Wellensiek, S. J. and M. Kauls. 1971. PNL 3:44-45.

7. Wellensiek, S. J. 1971. PNL 3:46-47.

8. Wellensiek, S. J. 1971. PNL 3:47.