Genetic control of dormancy in a Triumph/Morex cross in barley.

摘要: Seed dormancy in barley (Hordeum vulgare L.) is one of the most important parameters affecting malting. quantitatively inherited and variously influenced by environment. The objectives present study were to determine genome location effects quantitative trait loci (QTLs) involved expression seed a cross between two varieties derived from different germplasm pools. Using doubled-haploid population 107 lines malting types Triumph (two-row, dormant) Morex (six-row, non-dormant), phenotypic data sets five environments 147-marker linkage map developed order perform QTL analyses with simple interval mapping simplified composite procedures. Two variables considered for characterization: (1) level induced during development, which was indirectly measured as germination percentage at 3 days 7 days, GP3 GP7 respectively; (2) rate release course period after harvest (after-ripening). Different mechanisms genetic control detected these dormancy-related traits. A major consistent near centromere on chromosome 7(5H) associated establishment development accounted 52% 33% variability GP7, respectively. other QTLs located vicinity vrs1 locus 2(2H) long arm telomere explained 9% 19% variation, respectively, after-ripening. Likewise, assessed an F2 dormant distinct groups, (European, two-row, malt) Steptoe (North American, six-row, feed), showed similar but not identical dormancy. Interestingly, there remarkable conservation both regions identified this among populations. These widely conserved show potential targets selection moderate breeding programs.