Abstract
The introduction of high-yielding semi-dwarf varieties of wheat into cultivation has led to a "green revolution." This has required intensive research into various sources of dwarfism in wheat. However, there has been very little advancement in research on dwarfing genes in rye in comparison to wheat or barley. So far, three dominant dwarfing genes (Ddw1, Ddw3, and Ddw4) and three recessive genes (ct1, ct2, and np) have been characterized and precisely mapped in rye. There is no complete catalog of dwarfing genes available in rye. This paper presents an identification of the source of dwarfism and preliminary characterization of the new recessive gene dw9 from the BK-1 line. The gene was mapped on the long arm of the 6R chromosome and belongs to the GA-insensitive group. The initial characterization of the influence of this gene on morphological traits shows that it significantly affects the decrease of yielding trait parameters. A full evaluation can be performed after detailed breeding studies.
Highlights
Rye (Secale cereale L.) is a crop species from the tribe Triticeae (Poaceae)
The mean height of the dwarf line was 96.9 cm, and the plant height reduction determined by the dwarf gene present in the BK-1 line was slightly above 28% compared to the 541 line
The number of internodes occurring in line 541 was significantly different
Summary
Rye (Secale cereale L.) is a crop species from the tribe Triticeae (Poaceae). It is an important crop, especially for the region referred to as “rye belt,” which stretches from Northern Germany to Central and Northern Russia. Lodging is a very unfavorable occurrence that decreases yield level and grain quality [1]. This problem is often resolved using chemical plant growth regulators (PGRs), but the high costs and the pollution of the soil and grain with chemicals have prompted a search for other solutions [1,2]
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