Agronomy Science, przyrodniczy lublin, czasopisma up, czasopisma uniwersytet przyrodniczy lublin
Lodging affects effective plant growth and the quality as well as the volume of grain and straw, with significant yield losses resulting from difficulties at harvest. The most effective method to prevent lodging is to breed dwarf varieties. Nowadays, genes responsible for reducing the length of oat straw are not widely used in breeding programs because of unfavourable pleiotropic effects on yield. Given the known benefits of dwarfing gene usage in many other cereals, there is an urgent need to identify similar mutants in oats and to describe in details any potential sources of reduced straw length. Crosses of cultivars Bingo and Kanota with the semidwarf cultivar Heyne Dwarf were made to determine the genetic basis of the reduced length of Heyne Dwarf straw. The analysis of segregant height in both populations showed that the reduced length of straw in Heyne Dwarf is polygenically inherited, which complicates the possibility of using this variety as a source of semidwarfness. Simultaneously, the beneficial effects of crossing on the remaining components of the F2 hybrid plants and the selection opportunity of starting materials for oat breeding were demonstrated.
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