Use of Short-Stemmed Common Wheat Tom Pouce Blanc in Breeding of Hexaploid Triticale (X Triticosecale Wittmack). Analysis in F₁

K. S. TSVETKOV and St. M. TSVETKOV
Dobroudja Agricultural Institute, BG-9520 General Toshevo, Bulgaria

Abstract

TSVETKOV, K. S. and St. M. TSVETKOV, 2003. Use of short-stemmed common wheat Tom Pouce Blanc in breeding of hexaploid triticale (X Triticosecale Wittmack). Analysis in F₁. Bulg. J. Agric. Sci., 9: 407–410

Breeding and genetic investigations were carried out on F₁ hybrids originating from the crossing of short-stemmed common wheat Tom Pouce Blanc (plant height 45.0 cm) to the 42 and 56 chromosome triticales AD-durum forme and AD-SOS-3 (plant height 148.0 and 127.0 cm, respectively). The inheritance of plant height on a reciprocal basis is incompletely dominant (dominance rate +0.26 and +0.33 at 6x x 6x, and +0.44 and +0.51 at 6x x 8x). It was confirmed that the short-stemmed common wheat Tom Pouce Blanc carried the semi-dominant gene Rht3 for dwarting. The F₁ hybrids demonstrated very low spike fertility under controlled conditions. The mean number varied from 1.0 to 1.5 grains per spike.

Key words: triticale, hybridization, heritability, dominance rate, gene for short stem Rht3, spike fertility