Assessing tolerance to Asian soybean rust in soybean inbred lines from exotic and adapted crosses

Espolador, Fernando Garcia; Yassue, Rafael Massahiro; Morosini, Júlia Silva; Bornhofen, Elesandro; Barbosa, Pedro Augusto Medeiros; Souza, Renan Silva e; Vello, Natal Antônio

doi:10.1007/s10681-020-02597-8

Cited by 1 publication

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A tolerant plant is phenotypically similar to a susceptible one, which makes identification difficult (Newton, 2016). However, some studies have identified tolerant genotypes and crosses that can be used in soybean breeding programs (Espolador et al., 2020; Oloka et al., 2009; Pereira et al., 2018). To date, no studies in the literature have focused on the tolerance of vegetable soybeans to ASR.…”

Section: Discussionmentioning

confidence: 99%

“…The pathogen P. pachyrhizi survives whenever a soybean host plant is available and when the conditions favor ASR's development and further epidemic outbreaks (Akamatsu et al, 2013). According to Espolador et al (2020) obtaining ASRlines presents a great challenge, considering the genetic nature of the trait, given the properties of nonadditivity, low correlation, and dependence on multiple traits. Given the dynamic nature of the fungus P. pachyrhizi from year to year, continued studies on the identification of tolerant genotypes and management strategies are needed to further facilitate the adoption of edamame by Brazilian growers.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

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