Učinak selekcije na otpornost na priježetveno proklijavanje u ranim razdvajajućim generacijama pšenice

master's thesis

• Title (english): The effect of selection for pre-harvest sprouting resistance in early segregating generations in wheat
• Author: Krešimir Đuretec
• Mentor: Hrvoje Šarčević (mentor)
• Committee member: Hrvoje Šarčević (predsjednik povjerenstva)
• Committee member: Jerko Gunjača (član povjerenstva)
• Committee member: Zlatko Šatović (član povjerenstva)
• Committee member: Ana Lovrić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Plant Breeding Genetics, Biometrics and Experimentation); Zagreb
• Defense date and country: 2017-09-26, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Dormantnost zrna pšenice je glavna komponenta otpornosti na priježetveno proklijavanje, koja osigurava stabilnost pekarske kakvoće zrna u vlažnim uvjetima tijekom žetve. U ovom istraživanju je procijenjen učinak selekcije na povećanu dormantnost zrna, provedene u F3 generaciji nakon križanja nedormantnog (linija brkulja) i dormantnog (linija golica) roditelja, na dormantnost zrna dobivenih F7 potomstva. Za procjenu dormantnosti zrna korišten je test klijavosti s ovršenim zrnima. Rezultati su pokazali da je selekcija dovela do signifikantnog povećanja razine dormantnosti i kod golica i kod brkulja, pri čemu je pri čemu je učinak selekcije bio znatno veći kod golica nego kod brkulja. U skupini golica opaženo je pozitivno transgresivno razdvajanje rezultirajući s nekoliko F7 linija s razinom dormantnosti većom od dormantnog roditelja. Selekcija na povećanu dormantnost zrna dovela je do signifikantnog smanjenja visine biljke i kasnijeg klasanja kod F7 potomstava.

Abstract (english)

Dormancy of wheat grain is the main component of pre-harvest sprouting resistance, which ensures the stability of bread-making quality of the grain in humid conditions during harvest time. In this study, the effect of selection for increased grain dormancy, performed in the F3 generation from the cross of a nondormant (awned) and a dormant (awnless) parent, on grain dormancy in the obtained F7 progeny was estimated. To evaluate grain dormancy, a germination test with threshed grain was used. It was found that the selection resulted in a significant increase of the dormancy level in F7 progenies, whereby the selection was more effective in awnless compared to awned progenies. In the awnless group, positive transgressive segregation was observed, resulting in several F7 lines with dormancy level higher compared to dormant parent. Selection for increased grain dormancy has led to a significant decrease of plant height and an increase of number of days to heading in F7 progenies.

• Keywords: pšenica; dormantnost zrna; oplemenjivanje
• Keywords (english): wheat; grain dormancy; breeding
• Language: croatian
• URN:NBN: urn:nbn:hr:204:321520
• Study programme: Title: Plant Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar / magistra inženjer/inženjerka biljnih znanosti (magistar / magistra inženjer/inženjerka biljnih znanosti)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-10-20 10:19:55