AGRONOMIC PERFORMANCE OF BREAD WHEAT (triticum aestivum L.) AND HEXAPLOID TRITICALE (X triticosecale wittmack) FROM THE USE OF A SELECTION INDEX.

MAICH, R. H.; CHAVES, A. G.; CORAGLIO, M. C.; COSTERO, B.; TORRES, L. E.

AKADEMIAI KIADO RT

Año: 2006 vol. 34 p. 1123 - 1123

he objective of this research was to evaluate the actual agronomic performance in bread wheat (Triticum aestivum L.) and hexaploid triticale (X Triticosecale Wittmack) based on the use of a selection index constituted by eleven traits measured at plot level. Two samples of 142 S0 hexaploid triticale progenies and 89 S0 bread wheat progenies were sown under rainfed conditions and a selection index was constituted using the following traits: spikes (n°/plant−1 and n°/plot−1), grain and biological yield (g plot-1), harvest index (%), 1000 grain weight (g), grain (n°/plot−1), grain and biomass yield (g spike−1), harvest index spike−1) and straw yield (g spike−1). A disruptive selection intensity of 7.0 % (triticale) and 11.2% (bread wheat) was applied in both directions of the frequency distributions for the selection index. The 20 S1 triticale families (ten per group) and 20 S1 bread wheat families (ten per group) were evaluated during 2003. Grain and