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Inheritance of Reaction to Race 8 of Puccinia hordei Otth. in Two Barley Crosses¹

The F₂ and F₃ generations of the cross ‘Ga-Jet’ x ‘G. I. 11540’ and its reciprocal were studied for resistance to culture 64.2 of race 8 of Puccinia hordei in the seedling stage. The F₂ generation of Ga-Jet x ‘Cebada Capa’ was also observed for seedling reaction to the same culture of leaf rust. The results indicated that C. I. 11540 had one incompletely dominant gene conditioning resistance to leaf rust, while Cebada Capa had one completely dominant gene.

Key Words: Barley rusts • Dominance • Genetics of rust reaction

² Former graduate assistant now with Georgia Seed Development Commission, Plains, Ga., Associate Professor, Department of Agronomy, University of Georgia, Athens, Ga. 30601. Paper based on part of an M.S. dissertation submitted by the senior author to the Graduate Faculty of the University of Georgia.

Received for publication March 10, 1969.