2003•Sichuan Nongye Daxue xuebaoRequires access

Relationship between Heterosis and Genetic Distance Based on Simple equence Repeat Markers in Wheat

Zhi Zhang

Abstract

The relationship between hybrid performance involving 6 agnomic traits and genetic distance based on SSR markers, was investigated. Experimental results show that 23 simple sequence repeats (SSR) markers located on 21 chromosomes generated 74 bands, including 66 polymorphic bands (812%). At each SSR primers, 1 to 8 fragments can be detected, with an average of 32. Based on SSR data, the genetic distance (GD) between parental cultivars is calculated. The GD between parents varies from 0135 to 0486, with the average of 0297. The insignificant correlation between molecular genetic distance and hybrid performance is detected, except grain weight per spike. It is impossible to predict hybrid performance from genetic distance based on SSR markers.

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Key concepts: Genetic distance, Heterosis, Biology, Microsatellite, Genetics, Genetic marker, Genetic variation, Hybrid