Estimation Of Breeding Parameters Within And Between Malt Barley (hordeum Vulgare L) Crosses Using Phenotypic Traits And Kasp Snp Markers

The genetic variation in a breeding program is created by crossing genetically divergent parents. The resulting genetic variation between and within crosses is the determining factor for the offspring’s performance, which is defined as the level of compliance of the offspring with preset breeding goals. Estimation of breeding parameters plays a key role in crop improvement. The aim of this study was to (i) estimate and compare mid-parent value and the cross mean (ii) estimate and compare the variance between means of crosses (σ²c) and segregation variance of recombinant inbred line within crosses (σ²g) (iii) estimate correlation among the traits measured and their heritability (iv) estimate and compare Rogers Distances (RD) of parental lines and their correlation to the segregation variance within crosses, and (v) estimate usefulness of crosses. 900, F4:5 recombinant inbred lines randomly derived from 30 crosses were evaluated at two locations in modified split plot p-rep design whereas the parental where genotyped using SNP-KASP markers. The variance component analysis revealed significant (P

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