Italian ryegrass seed quality of different ploidy
2007
Simic, A., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Vuckovic, S., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Maletic, R., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Sokolovic, D., Institut za krmno bilje, Krusevac (Serbia) | Toskovic-Petrovic, S., Visa poljoprivredna skola, Sabac (Serbia)
Three cultivars (domestic (Serbian) K-13 diploid and K-29 tetraploid, and introduced Tetraflorum tetraploid) were investigated in two-year trials, with and without spring N-fertilizing. The results of this investigation showed that the high quality of Italian ryegrass seed could be achieved with two cuttings in the first production year. Spring N-application did not influence TSW (thousand seed weight), germination rate and total germination. The produced seed from the first harvest cut was of an excellent quality, with high germination rate (K-13 - 79%, K-29 - 88% and Tetraflorum - 87%) and total germination (K-13 - 91%, K-29 - 96% and Tetraflorum - 93%). The difference in TSW was obtained between diploid and tetraploids (in average 2.81 gr in proportion to 4.56 and 4.84 gr). The seed produced from the second harvest cut had lower germination and TSW.
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