Combining abilities and mode of inheritance for some root characteristics in sugar beet

Abstract

Sugar beet breeding is very complex because it involves numerous sugar beet root traits that must be measured and investigated, as a basis to create hybrids with high yield, high sugar content and appropriate root shape. In this paper were investigated combining abilities and mode of inheritance for root weight, root diameter and dry matter content of different sugar beet genotypes. Combining abilities were assessed by line x tester method. The mode of inheritance was assessed by evaluation of hybrids versus parents mean. For the estimation of combining abilities and mode of inheritance of analyzed traits were used 8 monogerm pollinators, 3 monogerm cms lines and their 24 F1 hybrids. The mode of inheritance for root weight and root diameter for most hybrid combinations was dominance of better parent. For inheritance of dry matter content intermediate level and partial domination of one parent were obtained.

Oplemenjivanje šećerne repe je izuzetno složeno zbog velikog broja osobina korena koje treba ispitati da bi se stvorili hibridi sa visokim prinosom korena, sadržajem šećera i odgovarajućeg oblika korena. U ovom radu su ispitivane kombinacione sposobnosti i način nasleđivanja mase korena, prečnika korena i sadržaja šećera različitih genotipova šećerne repe. Analizom linija x tester utvrđene su opšte i posebne kombinacione sposobnosti roditelja. Način nasleđivanja je određen upoređenjem srednjih vrednosti hibridnih kombinacija i roditelja. Kao materijal u ovom radu korišćeno je 8 monogermnih oprašivača, tri monogermne cms linije i 24 F1 hibrida dobijena ukrštanjem. Način nasleđivanja za masu korena i prečnik korena kod većine hibridnih kombinacije je bio dominacija boljeg roditelja. Način nasleđivanja sadržaja suve materije bio je intermedijaran i parcijalno dominantan.