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On the base of literature overview and on the base of the official National List of Varieties the comprehensive list of Slovenian cultivars was made. Some of new cultivars of agricultural plants were not entered to the official variety list in spite of that in practice were sown. The most of Slovenian cultivars of grapevine (26 cultivars), potatoes (17) and of hop (11) were bred in Slovenia. Slovenia has also some own cultivars of some field crops, grasses, legumes and vegetables, first of all of bean (8), chicory (4) and lamb's lettuce (3), but also has cultivars of some fruit trees. Taking into account, that Slovenia has comprehensive gene bank of some agricultural plants, there exists a great possibility for further effective plant breeding. Na podlagi literature ter uradnih sortnih list bivše Jugoslavije in samostojne Slovenije je narejen celoten pregled vzgojenih slovenskih sort kmetijskih rastlin. Nekatere sorte kmetijskih rastlin niso bile vpisane v uradne sortne liste, a so bile kljub temu nekaj časa v proizvodnji oz. na trgu (jablane, oreh, mandljevec), nekatere pa so bile v sortni listi samo krajsi čas. Največ slovenskih sort je bilo vzgojenih pri krompirju (17 sort) in hmelju (11) ter v zadnjem obdobju pri vinski trti (26). Slovenske sorte imamo tudi pri nekaterih poljsčinah, travah in deteljah, vrtninah, predvsem fižolu (8), radiču (4) in motovilcu (3) ter pri nekaterih sadnih vrstah. Glede na obsežno gensko banko nekaterih kmetijskih rastlin obstajajo velike možnosti za intenzivnejse žlahtnjenje slovenskih sort.

V proučevanje je bilo vključenih 6 križancev koruze pokovke, in sicer slovenski križanec koruze pokovke 'PopSkom' in 5 tujih križancev iz žlahtniteljskega inštituta v Gleisdorfu, Avstrija. Namen naloge je bil proučiti pridelek in kakovost novega slovenskega križanca koruze pokovke 'PopSkom' in ju primerjati s petimi tujimi križanci ter ugotoviti kakovost oziroma prostornino gotove pokovke ob določeni vlagi v zrnju. Poskus je bil izveden na dveh lokacijah, in sicer v Jablah pri Ljubljani in v Apačah pri Ptuju po metodi naključnega bloka v treh ponovitvah. Slovenski križanec 'PopSkom' ima belo zrnje, križanci iz Gleisdorfa imajo rumeno. V Apačah je imel največji pridelek najzgodnejši križanec 'PopSkom', v Jablah pa najpoznejši križanec GL-2. Po klasifikaciji Zieglerja (2001) imajo vsi križanci debelo zrnje. Vsebnost vlage v zrnju v vseh proučevanih vzorcih vseh križancev je bila med 11,4 in 15,9 %, prostornina gotove pokovke pa med 350 in 1320 ml na maso 30 g surovega zrnja. Največjo povprečno prostornino gotove pokovke je imel križanec GL-2 (1173,7 ml), najmanjšo pa 'PopSkom' (529,4 ml). Glede na prostornino gotove pokovke vseh vzorcev in vseh križancev v mejah med 12 in 14 % vlage v zrnju v prostornini pokanja ni bilo pomembnih razlik. Zato lahko za proučevane križance sklepamo, da je za optimalno prostornino gotove pokovke najprimernejša vsebnost vlage v zrnju v ugotovljenih mejah. The study included 6 popcorn hybrids: the Slovenian popcorn hybrid 'PopSkom' and 5 imported hybrids from the 'Saatzucht, Gleisdorf, Austria. The aim of the investigation was to find out the yield and quality of the new Slovenian popcorn hybrid 'PopSkom' in comparison with five introduced hybrids, and to determine the volume of popping at different grain moisture contents. The experiment was conducted at two locations: at Jable near Ljubljana and at Apače near Ptuj, using the randomised block design in three replications. The Slovenian hybrid 'PopSkom' was characterised by white grains, while the grains of the hybrids from Gleisdorf were yellow. At the Ptuj location, the highest yield was determined for the earliest hybrid 'PopSkom', while at Jable, the most productive was the latest hybrid GL-2. According to the classification of Ziegler (2001) all hybrids had thick grains. The moisture content of the grain in all studied samples of all hybrids ranged between 11.4 and 15.9% and the volume of popping was between 350 and 1320 ml per weight of 30 g of raw grain. The hybrid GL-2 showed the largest average volume of poping (1173.7 ml) and 'PopSkom' the smallest (529.4 ml). Regarding to the volume of the popping of all samples and all hybrids, within the range of the grain moisture between 12 and 14%, there were no significant differences. Taking into account the studied hybrids, we can conclude that these values of grain moisture contents are the most suitable for popping.

Namen naloge je bil opisati in ovrednotiti po IPGRI deskriptorjih 69 na novo pridobljenih populacij koruze, ki so bile v letih 2009 in 2010 pridobljene v okviru projekta SEEDNet. V proučevanje je bilo vključenih 68 domačih populacij koruze nabranih iz različnih območij Slovenije in ena populacija s Kosova. Poljski poskus je bil izveden leta 2013 na selekcijskem polju BF v Jablah pri Trzinu. V času rastne dobe smo na polju opravili meritve in opise 17 morfoloških lastnosti na 20 rastlinah 67 populacij. Po spravilu pridelka smo na 20 storžih izmerili in ocenili 18 morfoloških lastnosti storža in zrnja. V številnih proučevanih lastnosti se kaže velika variabilnost tako med populacijami kot znotraj populacij, kar je iz vidika žlahtnjenja zelo pomembno. Velika variabilnost se je pokazala pri višini rastlin (povprečno se giblje od 132,5–219,8 cm). Večina populacij ima po 1-2 storža na rastlino. Pri 10 populacijah smo zabeležili tudi po 3 storže na rastlino. Na splošno prevladujeta dva tipa zrna, in sicer poltrdinka in trdinka, pri posameznih populacijah pa polzobanke in zobanke. Velika variabilnost je v lastnostih storža in sicer v dolžini (11,2-22,6 cm) in premeru (2,77-4,98 cm) storža, številu vrst zrnja (8,2-16,7) in številu zrn v vrsti (18,3-40,5). Pri nekaterih populacijah je barva zrna, perikarpa, alevrona in endosperma precej neizenačena. Na podlagi rezultatov proučevanih lastnosti lahko sklepamo, da gre večinoma za domače populacije brez večjega skrižanja z drugimi genotipi in da bodo pomembno obogatile že hranjen genski material v slovenski genski banki koruze. The main aim of our research was to describe and evaluate 69 maize populations, according IPGRI descriptors. The population material was collected in Slovenia, during 2009-2010, within the frame of the international SEEDNet project. In the study wich we harvested were included 68 domestic populations of maize from different regions of Slovenia and one population from Kosovo. The material was planted in a field experiment, on the selection field of the Biotechnical Faculty at Jable near Ljubljana, in 2013. During the growth period, we took 17 biometric and descriptive data of 20 plants of 67 populations. After harvest, we measured and assessed 18 characteristics of 20 maize ears and grains. In many of the studied traits, we found significant variations among and within populations, which is particularly important for the genetic breeding process. There were significant differences in plant height (averages were between 132.5 and 219.8 cm). Most of the populations were characterised by one or two ears per plant. In 10 populations we recorded up to three ears per plant. In general, two types of grains prevailed: the semi-flint and flint. In certain populations, however, semi-dents and dents dominated. High variations were found also in some of the ear traits, especially in ear length (11.2-22-6 cm) and ear diameter (2.77-4.98 cm), number of grain rows per ear (8.2-16.7) and number of grains per row (18.3-40.5). In certain populations, the colours of grain, i.e., colours of pericarp, aleurone and endosperm, were uneven. The results of the analysis of studied traits indicate the studied populations were mostly of domestic origin. They have not been much intercrossed with other groups and they will additionally enrich the Slovenian maize gene bank.

Namen naloge je bil preučiti vpliv različnih rokov setve sladke koruze na čas spravila, pridelek in poškodbe s koruzno veščo (Ostrinia nubilalis) mlečno zrelih storžev sladke koruze. V preučevanje sta bili vključeni dve sorti sladke koruze, in sicer Zarja, slovenski križanec, in Gold Cup, križanec iz ZDA, ki je že dlje v prodaji v Sloveniji. Poljski poskus je bil izveden na poskusnem polju Biotehniške fakultete v Ljubljani na Centru za razvoj kmetijstva in podeželja v Jabljah pri Trzinu. Vsaka sorta je bila posejana na parceli velikosti 2 vrsti po 10 rastlin, razdalja setve je bila 70×25 cm, in sicer v 6-ih rokih setve od 8. maja do 24. junija. Poskus je bil optimalno oskrbovan s potrebnimi agrotehničnimi ukrepi. Setev in spravilo smo izvedli ročno. Med rastno dobo smo beležili čas cvetenja in preverjali ustrezno mlečno zrelost. Storže smo pobirali v času mlečne zrelosti, in sicer sproti, ko so dosegli primerno mlečno zrelost. V laboratoriju smo na svežih mlečno zrelih storžih izmerili dolžino in premer storžev, prešteli število vrst zrn na storžu ter vsak storž posebej stehtali. Za vse lastnosti smo izračunali povprečne vrednosti in koeficient variabilnosti. Rezultati so pokazali, da je s šestimi različnimi časovnimi roki setve od 8. maja do 24. junija, mogoče zagotoviti razpoložljivost svežih mlečno zrelih storžev sladke koruze od 13. avgusta do 1. oktobra. Sorta Zarja, ki je zgodnejša sorta, je prej cvetela in je ob prvih pobiranjih imela več primerno mlečno zrelih storžev. Sorta Gold Cup je imela nekoliko daljše, debelejše in težje storže, je bila pa v vseh lastnostih manj izenačena kot Zarja. Najvišje vrednosti za dolžino, debelino in maso storžev smo pri obeh sortah dobili pri 1. in 2. roku setve, najnižje pa v zadnjem, 6. roku setve. Odstotek poškodovanih storžev s koruzno veščo je bil pri obeh sortah podoben, občutno več poškodb je pri obeh sortah bilo v zadnjem, 6. roku setve. The main aim of our work was to study the impact of different sowing dates of sweet maize on harvest time, yield and damage of sweet maize ears caused by the European corn borer. In this study, two hybrids of sweet maize were included, namely the Slovenian hybrid Zarja and the USA hybrid Gold Cup. The field experiment was conducted at the Experimental field of the Biotechnical Faculty at Jable near Ljubljana. Each hybrid was planted on 6 different dates from 8th of May till 24th of June, at 8-10 days intervals. Sowing and harvesting were carried out manually. During the growth period, we recorded the dates of tasseling and silking, and the time of 'milk' maturity. The ears were harvested when they reached the appropriate stage of 'milk' maturity. We determined the length and weight of ears, and the grain rows number. Results showed that with 6 different sowing dates, from 8th May to 24th June, it was possible to provide fresh mature sweet maize ears from 13th August till 1st October. The Slovenian variety Zarja was earlier than Gold Cup. Zarja was characterised by more mature maize ears at earlier harvesting. The Gold Cup had longer, thicker and heavier ears although all recorded properties exhibited higher variability when compared to Zarja. Longest, thickest and heaviest maize ears were harvested during 1st and 2nd terms of harvest, whereas the shortest, thinnest and lightest ears were recorded during last 6th terms. The percentage of damaged ears by the European corn borer was the same in both hybrids. The highest percentage of damaged ears, in both hybrids, were recorded during the 6th term of harvest.