Giunta, Francesco and Motzo, Rosella and Deidda, Mauro (1999) Grain yield analysis of a triticale (×Triticosecale Wittmack) collection grown in a Mediterranean environment. Field Crops Research, Vol. 63 (2), p. 199-210. ISSN 0378-4290. Article.
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The breeding of triticale (X Triticosecale Wittmack) is of great importance in those Mediterranean environments where low winter temperature and soil acidity interact with drought, increasing the adaptability of this species in comparison with other temperate cereals. In order to identify the way in which the various yield components contribute to the realisation of high yields in a Mediterranean environment, and the effect of a different phenology on these patterns, a two-year trial was carried out in Sardinia (Italy) with 271 pure lines grown under rainfed conditions. The relationships between characters were assessed by phenotypic correlation analysis after grouping the lines into phenological classes. In both years total biomass explained more of the variation in yield than harvest index and was little affected by earliness. Both total biomass and HI were strongly correlated with kernels m−2. More kernels m−2 are therefore essential to obtain high grain yields in triticale, regardless of earliness, highlighting the importance of the pre-anthesis period, even in conditions of increasing drought stress during spring. Grain yield showed a closer correlation with HI in the less favourable year, but became independent of HI above values of 20-25,000 kernels m−2 and HI values of 0.35. The winter types were taller, with less spikes m−2, and a longer and more fertile spike than the spring types.
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