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Genetic effects of Vrn genes on heading date and agronomic traits in bread wheat



Genetic effects of Vrn genes on heading date and agronomic traits in bread wheat



Euphytica 65(1): 53-60, 1992



The Vrn1, Vrn2 and Vrn3 genes have different values of effects on heading date and related yield components (in Triticum aestivum). The genetic background and environment do not affect the ranking of Vrn genotypes according to earliness within near-isogenic line sets; however, they do influence the level of differences between heading dates of particular genotypes and between effect values, respectively. The frequencies of defined Vrn genotypes in the global set of spring bread wheat cultivars are associated with grain weight per plant predicted on the basis of Vrn gene effects averaged over backgrounds and over environments. Peculiarities of backgrounds and environments alter the grain yield ranges of Vrn genotypes. For early photoperiod-insensitive wheats, planted in stress conditions at grain filling, the highest yield was predicted for double dominant Vrn genotypes with Vrn3. This gene is rarely used by the breeders in middle latitudes and its wider adoption is encouraged.

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Accession: 002390802

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DOI: 10.1007/bf00022199



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