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- Title
Gene pyramiding combinations confer resistance of Asian soybean rust.
- Authors
Meira, Daniela; Panho, Maiara Cecilia; Beche, Eduardo; Woyann, Leomar Guilherme; Madella, Laura Alexandra; Milioli, Anderson Simionato; Colonelli, Lucas Leite; Malone, Gaspar; Brito, Salvador Lima; Benin, Giovani
- Abstract
Pyramiding Rpp genes is a promising strategy to achieve a more durable resistance against Asian soybean rust (ASR). The objective of this study was to develop Rpp‐pyramided populations and evaluate their resistance and yield in field conditions. Fifteen pyramided populations carrying different combinations of Rpp genes were developed, and the F3 lines were evaluated to phenotypic resistance and yield performance. Our results suggest that the Rpp1‐b of different resistant sources (PI 587880A, PI 594723, PI 4538A) have higher resistance and yield performance compared with other Rpp genes. Rpp‐pyramided populations carrying two and three genes showed an increase in resistance compared with populations carrying a single Rpp gene. The best gene combinations were Rpp1‐b + Rpp5, showing neither uredinia formation nor sporulation (immunity + RB1 phenotype reaction) in more than 70% of the F3 population. Rpp‐pyramided lines developed in this study have the potential to be used in backcross programs for improving ASR resistance. Core Ideas: Rpp‐pyramided populations carrying two and three Rpp genes show higher resistance to ASR.Rpp1‐b + Rpp5 could be an interesting option to achieve resistance.Rpp‐pyramided lines have potential to be used in backcross programs for improving ASR.
- Subjects
SOYBEAN; PYRAMIDS; GENES; PHENOTYPES; SOY oil; IMMUNITY
- Publication
Crop Science, 2022, Vol 62, Issue 2, p792
- ISSN
0011-183X
- Publication type
Article
- DOI
10.1002/csc2.20700