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Effect of Advanced Cycle Breeding on Genetic Diversity in Barley Breeding Germplasm

Dep. of Agronomy and Plant Genetics, Univ. of Minnesota, St. Paul, MN 55108; present address for F. Condón: INIA La Estanzuela, Rta 50 km 11, CC 39173, Colonia, Uruguay

View larger version (23K): [in this window] [in a new window]   Figure 1. Pedigree from an advanced cycle breeding program including the last seven malting barley cultivar candidates released from the University of Minnesota. Bold letter names correspond to released cultivars. Boxes with thick gray border correspond to crosses made in the breeding program. Boxes without names refer to unknown intermediate genotypes. Round boxes correspond to genotypes with pedigrees not included in the figure. The different types of connecting lines are drawn to clarify the relationships among the breeding lines.

View larger version (12K): [in this window] [in a new window]   Figure 2. Biplot for the PC1 and PC2 of the Correspondence analysis. Gray solid circles are the regional ancestors, open circles are the parental lines, black solid triangles are EL58–67, open triangles EL68–77, gray solid squares EL78–87, black solid squares EL88–98. Oblong circles enclose at least 80% of lines in EL58–67 and EL88–98.