Vegetative and agronomic characteristics of wild populations of orchard-grass (Dactylis glomerata) from Mediterranean and Atlantic regions grown in Central European conditions
2001
Mika, V. (Vyzkumny Ustav Rostlinne Vyroby, Jevicko (Czech Republic). Vyzkumna Stanice Travnich Ekosystemu) | Mousset, C.
Field trials with 43 collection items and the assortment of Czech cultivars of orchard-grass and one cultivar of forest cocksfoot (Dactylis polygama) were established at two trial sites and conducted in the period 1997 till 1999 harvested three times a year. All kinds of orchard-grass well tolerate continental winter in the Czech Republic, however no ecotype shows active growth during warmer winters without snow. Significant differences among tested items were also found out for alternativity, earliness in heading, plant height in heading, average number of panicles per plant, length of leaf blade of sterile offshoots, length of blade of stem offshoots, number of functional leaves on stem, rust resistance, grass mildew resistance, dry matter yield in the third harvest, speed of regrowth after the first harvest. Forage productivity of diploids (Dactylis glomerata ssp. galiciana, D. g. ssp. lusitanica, D. polygama) was in average by 16 % lower compared to tetraploid ecotypes and cultivars of Dactylis glomerata. It shows a possibility of practical use of orchard-grass ecotypes from maritime region for breeding of new cultivars of orchard-grass.
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