An experimental study of ecological differences in winter growth between sympatric diploid and autotetraploid Dactylis glomerata

chromosome number cold crecimiento croissance dactylis glomerata ecotipos ecotypes fenologia feuille floraison flowering frio froid growth hiver hojas invierno leaves nombre chromosomique phenology ploidy poliploidia polyploidie polyploidy resistencia a la temperatura temperatura temperature temperature resistance temps tiempo time winter