News

China: In the selection of resistant lines of wheat to the stem rust strain Ug99, scientists used rye genes

Wheat
Rye
China
Published Jun 28, 2022

Tridge summary

Recently, a research team of Dr. Han Fangpu of the Institute of Genetics and Developmental Biology of the Chinese Academy of Sciences announced the creation of new wheat lines with the Ug99 stem rust resistance gene. This was reported by phys.org. The report says that the Ug99 strain is harmful to many varieties of wheat around the world, and therefore poses a threat to global food security. "Therefore, it is extremely important to obtain new sources of resistance genes to introduce them into new varieties of wheat.

Original content

Rye is a close relative of wheat, resistant to brown leaf rust, striped rust, stem rust and powdery mildew, "the statement reads. According to researchers, rye has become a valuable resource for genes for resistance to many diseases to improve wheat genetics. During the study, scientists identified two completely new sets of disomic lines using molecular cytogenetic methods. Subsequently, a new set of telosomal complex lines was obtained from the descendants of monosomal wheat and rye lines. By assessing disease resistance, cytological analysis, and molecular markers, the researchers found that the 3RL wheat and rye telosomal lineage carried a new resistance gene to the Ug99 strain that could be used in future breeding programs to create rust-resistant wheat varieties. Additionally, it is noted that various chromosomal and centromeric variations can be introduced by remote hybridization of wheat and rye. As a result of this process, the descendants of wheat and rye form ring ...
Source: Superagronom
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