title: Methods to predict transgressive segregation in barley and other self-pollinated crops.
abstract: Most of agronomically important characters are biometric traits. An improvement of these traits in cultivated plants by deriving segregants superior to parents, which could be developed as cultivars, is a main goal in breeding of self-pollinated crops. Two problems need to be solved: when will the progeny be better than its parents and how can a genetic potential of a given pair of parental genotypes be predicted? In this paper, transgressive segregation in homozygous barley populations is shortly reviewed. Various approaches to choosing parental forms are shown, and a theoretical method for predicting the frequency of transgressive segregants in a homozygous population is presented. Additionally, relationships between parental diversity estimated with molecular markers and the progeny performance are discussed. Although the prediction of transgressive segregation is still a problem, it seems promising to apply an approach measuring the performance of the parental genotypes and estimating their genetic distance by molecular markers.
authors.affiliation: Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, Poznań, Poland. akucz@igr.poznan.pl
authors.forename: Anetta
authors.initials: A
authors.lastname: Kuczyńska
authors.forename: Maria
authors.initials: M
authors.lastname: Surma
authors.forename: Tadeusz
authors.initials: T
authors.lastname: Adamski
mesh_terms: D003433:Crosses, Genetic; D017343:Genes, Plant; D005819:Genetic Markers; D001467:Hordeum / Q000235:genetics*; D006823:Hybrid Vigor; D006824:Hybridization, Genetic; D010641:Phenotype; D019655:Quantitative Trait, Heritable
chemical_list: D005819:Genetic Markers