Importance of Gigas forms for wheat breeding for high spike fertility
1990
Foltyn, J. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (CSFR))
The spike of most varieties of common wheat Triticum aestivum L. with a standard spikelets number in a spike (maximally 21 spikelets in Central European ecological zone) has typically most sizeable spikelets in about one third of the spike length (from below); the spikelets at the spike base used to be set with grains scantly or they are infertile. On the other hand, the lowest spikelet robustness of the spike Gigas form closely resembles the middle spikelet size. When crossing Gigas Oligoculm varieties with our mutant sources of wheat double spikelets of duospiculum type (banana twin spikelets), which are hereditary dominantly not only in F1 but also in F2 and F3 generations, the lowest spikelets of spring form selected plants had several grains in the case of rachis internodes non-reduced numbers and even when setting several internodes with double spikelets.
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