20.500.12556/DKUM-12364 VARIABILNOST DEBELINE SEMENSKE LUPINE PRI NAVADNI BUČI Variation of seed coat thickness in marrows Oljne buče pripadajo vrsti Cucurbita pepo. Gojijo se predvsem zaradi semen iz katerih se pridobiva bučno olje. Za prehrano ljudi in živali so uporabni so tudi drugi deli rastline (nedozorelih in dozorelih plodov, vršički stebel in cvetovi). Semena modernih sort oljnih buč so brez lignificirane semenske lupine in takšnim sortam pravimo golice. Poleg nelignificirane semenske lupine se pri navadnih bučah pojavljajo še različne oblike delne lignifikacije in povsem lignificirana semenska lupina. Namen diplomske naloge je bil analizirati variabilnost stopnje lignifikacije. Rastlinski material, ki smo ga uporabili je obsegal različne genotipe jedilnih buč, okrasne tipe navadne buče, materiale, nastale pri žlahtnjenju oljnih genotipov, sorto ´Slovenska golica´, sorto ´Gleisdorfer Ölkürbis´ in nekatere medvrstne križance, v katere sta bili vključeni, poleg navadne buče, tudi Cucurbita argyrosperma in C. moschata. Za določitev stopnje lignificiranosti smo uporabili dva pristopa: (1) na osnovi prosojnosti semenske lupine in (2) na osnovi časa potrebnega za navlažitev semena. Raziskava je pokazala, da je na osnovi prvega pristopa možno razlikovati 22 razredov, na osnovi drugega pa 18 razredov. Rezultati raziskave predstavljajo koristno informacijo za delo na žlahtnjenju oljnih buč. Z delno lignificirano semensko lupino bi bilo možno povečati odpornost na škodljivce in bolezni ter neugodne razmere v tleh v času setve. Oil pumpkins which belong to the species Cucurbita pepo are grown mainly because of seeds which are used for oil extraction. Oil pumpkins are also used in human and animal nutrition (young and mature fruits, young shoots and flowers). Seeds of modern cultivars of oil pumpkins are characterised by hull-less seeds. The main objective of this study was to analyse the variation of levels of lignification of Cucurbita pepo seeds (field pumpkins, vegetable marrows, ornamental genotypes, various breeding materials and oil pumpkin varieties such as ´Slovenska golica´ and ´Gleisdorfer Ölkürbis´, and some interspecific hybrids which involved C. pepo, C. argyrosperma and C. moschata. For the determination of the level of lignification, two approaches were used: (1) the approach based on transparency of the seed coat, and (2) the approach based on time needed for a complete moisturing of seed. The investigation showed that the first approach resulted in 22 classes associated with levels of seed coat lignification, whereas the second approach resulted in 18 classes. The results could be used in practical genetic breeding aimed at creating higher levels of resistance and/or tolerance of oil pumpkin seeds against pest and diseases, and unfavourable environmental conditions during seeding. Oljne buče Cucurbita pepo golo seme zgradba semenske lupine stopnja lignifikacije semenske lupine Oil pumpkins Cucurbita pepo 'hull-less' seed seed coat stucture levels of seed coat lignification true true false Slovenski jezik Angleški jezik Diplomsko delo 2009-11-04 20:38:57 2009-11-06 14:57:29 2022-04-12 07:26:06 2022-04-19 03:23:20 2009 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 URN:SI:UM:DK:9K0WEBI1 UNI_Stabuc_Mateja_2009.pdf UNI_Stabuc_Mateja_2009.pdf 1 4C6BE5B61A26E8C11322F3C641A26023 ee0e0306e47916941caf946ff022970261c98323e140de02debc0b438a15c03b 64180a15-7c03-11eb-bb7a-00155d0001ca 20.500.12556/dkum/efe8e2ee-cc80-4a43-a69b-e4aa83f7cc39 https://dk.um.si/Dokument.php?lang=slv&id=11751 Fakulteta za kmetijstvo in biosistemske vede 0 0 0