Formation of broomcorn core-collection

Abstract

From the broomcorn germplasm that is collected and maintained in the Institute of field and vegetable crops Novi Sad (includes 450 genotypes) core collection was separated. First there was done stratification based on stalk height and fiber length, and then from every formed group of genotypes was selected proportionally to height of group and their geographical origin. Formed core collection counted 54 genotypes, which represents 12 % of based collection. Formed core was compared with based collection for variation of their teen quantitative traits. Cluster analysis was used for formatting dendogram of phenotypic differences in core collection. Depends on trait, core collection includes 68-100 % variation of basic collection and can be representatively used in sorghum breeding program.

Iz germplazme sirka metlaša u Institutu za ratarstvo i povrtarstvo Novi Sad koja broji 450 genotipova izdvojeno je jezgro kolekcije. Najpre je urađena stratifikacija na bazi visine stabla i dužine peteljki metlice a zatim su iz pojedinih grupa proporcionalno njihovoj veličini odabrani genotipovi na bazi geografske pripadnosti. Formirano jezgro kolekcije broji 54 genotipa, što predstavlja 12 % od osnovne germplazme. Formirano jezgro je upoređeno sa osnovnom kolekcijom u pogledu varijacije trinaest kvantitativnih osobina. Uz primenu klaster analize formiran je dendogram fenotipskih razlika jezgra kolekcije. Pošto formirano jezgro, u zavisnosti od osobine, obuhvata 68-100 % varijacije osnovne kolekcije, možemo tvrditi da ono u potpunosti reprezentuje kolekciju genotipova sirka metlaša.