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F₁ Evaluation of Yield Potential in Hexaploid Triticale¹

Eight hexaploid triticale (X Triticosecale Wittmack) F₁ populations were evaluated on the basis of yield in 1972 and 1973 at Winnipeg, Manitoba. In each year, one low-, two intermediate-, and one high-yielding F₁ populations were retained for F₃ evaluation in an early-generation yield trial. Comparisons were made of F₁ and F₃ yield rankings, also the number of high-yielding F₃ families produced by each F1 population. The results indicated that evaluation of crosses on the basis of F₁ single plant yield was ineffective for the selection of crosses with a high yield potential in subsequent generations.

Key Words: Wheat-rye hybrids • Breeding methodology • Early-generation testing

² Former graduate student, professor of plant science, and associate professor of plant science, respectively.

Received for publication April 7, 1977.