title: [DNA divergence as a criterion for the choice of the initial material of the sweet pepper (Capsicum annum L.) in selection for heterosis].
abstract: The identification of perspective parental forms for the creation of high-yield hybrids is the most labor-consuming stage of selection, because it needs extensive crossings and trials of combinative ability. Based on eval- uation of the genetic divergence of the parental forms, the efficiency of the prediction of the yield potential of F1 hybrids of the sweet pepper (Capsicum annuum L.) was investigated in this study. The value of the divergence was calculated using biometric and molecular analyses, such as inter simple sequence repeats (ISSR) and random amplified polymorphic DNA (RAPD). As a result of molecular-genetic study on the selective collection, 10 lines were selected for cyclic cross (scheme I) and testcross (scheme II). In most combinations, the F1 hybrids were significantly superior to the parents in the main economically valuable traits. The level of heterosis was significantly higher among hybrids of scheme I. Analysis of the relationship between parental divergence and F1 performance showed that the hybrid productivity of scheme I was predetermined by ISSR divergence in 86%, and productivity was caused by RAPD divergence in 69%, whereas the F1 yield of scheme II was not related to the value of genetic distances. Since the values of DNA divergence were closely associated both with mid-parent level and F1 performance, we assumed that some part of the polymorphic DNA fragments of the constituents of scheme I is related to heterotic loci (HTL), which may be considered potential markers for the choice of the initial material in selection for heterosis.
authors.forename: M N
authors.initials: MN
authors.lastname: Shapturenko
authors.forename: L A
authors.initials: LA
authors.lastname: Tarutina
authors.forename: L A
authors.initials: LA
authors.lastname: Mishin
authors.forename: A V
authors.initials: AV
authors.lastname: Kil'chevskiĭ
authors.forename: L V
authors.initials: LV
authors.lastname: Hotyleva
mesh_terms: D002212:Capsicum / Q000235:genetics*; D003433:Crosses, Genetic; D005819:Genetic Markers; D014644:Genetic Variation; D006823:Hybrid Vigor / Q000235:genetics*; D018895:Microsatellite Repeats / Q000235:genetics; D010802:Phylogeny; D019105:Random Amplified Polymorphic DNA Technique; D012641:Selection, Genetic
chemical_list: D005819:Genetic Markers