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Linkage Tests of Mendelian Male Sterility and Other Genetic Characters in Sugarbeets, Beta vulgaris L.

Linkage tests involving nine genetic factors in Beta vulgaris L. were conducted in the greenhouse. The genetic male sterile (a₁) gene was inherited independently from eight other factors. Linkage between red hypocotyl color (R) and trout leaf (Tr) and lack of association of monogerm (m) and russet root (ru) with the Y-R-B linkage group, as noted by other research workers, was confirmed. The dwarf factor (d) and lutescens (lu₂) appeared to be independent of the Y-R-B group. The ru and lu₂ characters are not associated with m. A summary table of linkage groups in sugarbeets and linkage maps for two of these groups are presented.

Key Words: sugarbeet genetics • linkage • male sterility

² Research Geneticist, Crops Research Division, ARS, USDA, Logan, Utah 84821.

Received for publication January 24, 1968.