Parent-Offspring Popping Expansion Correlations in Progeny of Dent Corn ✕ Popcorn and Flint Corn ✕ Popcorn Crosses1
- W. A. Robbins and
- R. B. Ashman2
Experiments were conducted to determine the potential for use of dent ✕ popcorn (Zea mays L.) and flint ✕ popcorn crosses as breeding material for popcorn improvement. Two popcorn inbreds were crossed to both a dent and a flint inbred and several F1 plants from each cross were selfed. F2 plants from each of the four crosses were grown in 1979, self-pollinated, and crossed to a single-cross popcorn tester. The ears from the F2 plants were evaluated for popping expansion. The F3 and test-cross families were grown in 1980 and evaluated for popping expansion. The popping expansion differences among the F3 families from all four crosses were highly significant. Linear correlations between the F2 and the F3, and the F2 and the test-cross popping expansions were determined, and all correlation coefficients were highly significant. In the correlations of the F2 with the F3 the two flint ✕ popcorn crosses had coefficients of +0.84** (significant at the 0.01 level of probability) and +0.81**, which were the highest obtained, and the two dent ✕ popcorn crosses had coefficients at +0.63* and +0.76*. These high correlations, and the significant differences among F3 families, show that selection for popping expansion in F2 ears would be effective in population improvement. F3 families from the dent and flint corn crosses to one popcorn inbred had similar popping expansion means and ranges, indicating that popping expansion could be as easily recovered from crosses to dent corn as from crosses to flint corn.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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