Research Article Severity of rust infection in soybean genotypes with partial resistance as a function of temperature and leaf wetness duration

Juliatti, Breno Cezar Marinho; Pozza, Edson Ampélio; Juliatti, F. C.

doi:10.4238/gmr18781

Cited by 1 publication

(1 citation statement)

References 42 publications

(90 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meteorological and environmental conditions are critical components that benefit ASR, the most damaging fungal disease of soybean (Del Ponte & Esker, 2008). The combination of temperature and leaf wetness duration produced better conditions for fungal infection (Juliatti et al., 2021). In the present work, we observed favorable conditions for the development of ASR in the years when the experiments were evaluated.…”

Section: Discussionmentioning

confidence: 99%

Impact of Asian soybean rust on vegetable soybean, considering two stages of development

et al. 2023

View full text Add to dashboard Cite

Diseases can cause negative impacts during all stages of development of soybean [Glycine max (L.) Merr.] Asian soybean rust (ASR) (caused by Phakopsora pachyrhizi) is the most destructive. The impact of ASR on vegetable soybean (consumed when the seeds are still immature) have not been studied rigorously. Thus, in a 2-yr study, we assessed 42 F 6 lines from crosses of soybean vegetable genotypes and three commercial cultivars ('BRS 257', 'BRS 267' and 'IAC 100') in two sites. During the R 6 and R 8 development stages, the genotypes were evaluated for 10 traits.The joint analysis showed that the interactions were significative for the most traits. The significance of the rust effect allowed us to identify the genotypes in which the losses were nonsignificant. We observed that ASR affected two stages of plant development. However, information about ASR losses quantified by the rust reaction rate (RRR) enabled the researchers to select lines that could be used in breeding programs aiming towards ASR tolerance. We found three lines that were superior to one of the cultivar checks. Furthermore, cluster analysis for RRR was useful in establishing the most promising groups of vegetable soybean genotypes for use in hybridization aiming to expand the genetic base for vegetable soybeans and integrate new genetic resources of vegetable soybean in the Brazilian genetic pool to ensure genetic gain.

show abstract

Section: Discussionmentioning

confidence: 99%