VARIATION IN YIELD AND ENERGETIC COMPONENTS OF MAIZE HYBRIDS AND INBRED LINES FOR SILAGE

Dvanaest inbred linija kukuruza i 24 njihovih hibridnih kombinacija analizirano je na prinos suhe tvari cijele biljke, zrnatog - nezrnatog dijela, sadržaja vlage, pepela, surovih proteina, surove masti, surovih vlakana i NET-a, u cilju primjene u oplemenjivanju silažnog kukuruza s visokim prinosom probavljivog nezrnatog dijela. Rezultati istraživanja pokazuju veliku varijabilnost između hibrida u prinosu suhe tvari cijele biljke, nezrnatog dijela i surovih vlakana. Sličnu varijabilnost pokazuju i inbred linije. Rezultati kemijskih analiza pokazuju da je sadržaj sirovih proteina i surovih masti kod hibrida i inbred linija slabo varijabilan, a NET-a, i osobito surovih vlakana, visoko varijabilan. S obzirom na prinos neznatog dijela i kemijski sastav, četiri od 12 ispitivanih inbred linija mogu se smatrati perspektvnim u daljnjem oplemenjivačkom radu. Tri od 24 promatrana hibrida potrebno je ispitati na probavljivost ukupne suhe tvari i surovih vlakana.Twelve inbred lines and their 24 crosses were analysed for variability in dry matter yield of the whole plant and the grained - ungrained part, as well as variability in content of water, ash, crude proteins, crude fats, crude fibres and NFE, respectively with the aim to breed maize with high yield and digestibility of the ungrained part. The results have shown high variability between hybrids in dry matter yield of the whole plant, the ungrained part and crude fibres. Similar variability is recorded for inbred lines, too. The results of chemical analyses of hybrids and inbred lines have shown that crude protein content and crude fat content had low variability. In contrast, NFE and specially crude fibres had high variability. Begarding yield of the ungrained part and chemical composition, four out of 12 studied inbred lines have been selected as promising for further breeding. Three out of 24 studied hybrids should be tested for total dry matter and crude fibres digestibility