A Six-Parent Diallel Cross Analysis of Coleoptile Elongation in Wheat, Triticum aestivum L.1
- P. C. Parodi,
- F. L. Patterson and
- W. E. Nyquist2
The F1 generation of a diallel cross among the soft red winter wheat genotypes ‘Vermillion,’ ‘Seneca,’ ‘Knox 62,’ ‘Benhur,’ ‘Arthur,’ and Purdue 5215 showed a significant expression of heterosis and heterobeltiosis in coleoptile elongation; all F1 progenies surpassed midparent and higher parent coleoptile lengths. However, this superiority was probably due in part to the larger seed size of the hand-crossed seed, because the F2 progenies essentially equalled the midparental values. Genetic variation in coleoptile elongation appeared to be controlled largely by additive gene action. Regression coefficients of F1 on midparent and F2 on F1 were .957 to .783, respectively, indicating high heritability of the character. Study of small and large size seed fractions of the parents revealed a significant influence of seed size upon coleoptile elongation and seedling fresh weight.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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