Assessment of wheat genotypes based on genotype-by-environment interaction for durable resistance to spot blotch disease in hot spot

Chattopadhyay, N.; Mandal, Rupsanatan; Roy, Anjan Kumar; Bhattacharya, P. M.; Chowdhury, A. K.

doi:10.1007/s42976-021-00164-y

Cited by 4 publications

(3 citation statements)

References 38 publications

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“…A key observation in this study is that among the 214 significant markers in all the panels, only 96 were significant in more than one panel and only two markers were significant in four panels. While this could be partly attributed to the variable allele frequencies and marker missing data in the different panels for some markers, it also indicates a strong effect of genotype × environment interactions ( Singh et al, 2015 ; Mahapatra et al, 2020 ; Chattopadhyay et al, 2021 ; Roy et al, 2021 ) in identifying consistent spot blotch associated markers, and highlights the need for multiple evaluations for spot blotch to identify lines with stable spot blotch resistance ( Singh et al, 2015 ). The positions of all the 96 markers consistently associated with spot blotch in this study were compared to previously reported spot blotch associated markers/QTL, whose positions were either available in the RefSeq v1.0 or obtained using their sequences in the nucleotide Basic Local Alignment Search Tool available in Triticeae Toolbox ( Blake et al, 2016 ).…”

Section: Discussionmentioning

confidence: 99%

Genome-Wide Association Mapping Indicates Quantitative Genetic Control of Spot Blotch Resistance in Bread Wheat and the Favorable Effects of Some Spot Blotch Loci on Grain Yield

Juliana

Poland

et al. 2022

Front. Plant Sci.

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Spot blotch caused by the fungus Bipolaris sorokiniana poses a serious threat to bread wheat production in warm and humid wheat-growing regions of the world. Hence, the major objective of this study was to identify consistent genotyping-by-sequencing (GBS) markers associated with spot blotch resistance using genome-wide association mapping on a large set of 6,736 advanced bread wheat breeding lines from the International Maize and Wheat Improvement Center. These lines were phenotyped as seven panels at Agua Fria, Mexico between the 2013–2014 and 2019–2020 crop cycles. We identified 214 significant spot blotch associated GBS markers in all the panels, among which only 96 were significant in more than one panel, indicating a strong environmental effect on the trait and highlights the need for multiple phenotypic evaluations to identify lines with stable spot blotch resistance. The 96 consistent GBS markers were on chromosomes 1A, 1B, 1D, 2A, 3B, 4A, 5B, 5D, 6B, 7A, 7B, and 7D, including markers possibly linked to the Lr46, Sb1, Sb2 and Sb3 genes. We also report the association of the 2NS translocation from Aegilops ventricosa with spot blotch resistance in some environments. Moreover, the spot blotch favorable alleles at the 2NS translocation and two markers on chromosome 3BS (3B_2280114 and 3B_5601689) were associated with increased grain yield evaluated at several environments in Mexico and India, implying that selection for favorable alleles at these loci could enable simultaneous improvement for high grain yield and spot blotch resistance. Furthermore, a significant relationship between the percentage of favorable alleles in the lines and their spot blotch response was observed, which taken together with the multiple minor effect loci identified to be associated with spot blotch in this study, indicate quantitative genetic control of resistance. Overall, the results presented here have extended our knowledge on the genetic basis of spot blotch resistance in bread wheat and further efforts to improve genetic resistance to the disease are needed for reducing current and future losses under climate change.

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Section: Discussionmentioning

confidence: 99%

Genome-Wide Association Mapping Indicates Quantitative Genetic Control of Spot Blotch Resistance in Bread Wheat and the Favorable Effects of Some Spot Blotch Loci on Grain Yield

Juliana

Poland

et al. 2022

Front. Plant Sci.

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“…The continuous distribution of disease scores across all experiments indicates the quantitative character of resistance driven by the additive action of numerous QTLs and genes (Ayana et al., 2018; Joshi et al., 2004; Kumar et al., 2007, 2009; Neupane et al., 2007; Singh et al., 2018; Singh et al., 2023). ANOVA revealed significant effects of year and genotype‐by‐year, highlighting the need for multiple evaluations for SB across years/locations to identify lines with stable resistance and reliable markers for breeding (Chattopadhyay et al., 2022; Roy et al., 2021; Singh et al., 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Shoemaker) (teleomorph: Cochliobolus sativus [Ito and Kuribayashi] Drechsler ex Dastur) is of major concern in warm wheat growing areas of the world, such as eastern India, Bangladesh, Nepal, China, Southeast Asia (Thailand, Philippines, Indonesia), Latin America (Bolivia, warmer regions of Brazil, Paraguay, northeast Argentina), and Africa (Tanzania and Zambia) (Chattopadhyay et al., 2022; Duveiller & Sharma, 2009; Juliana et al., 2022). Under hot and humid conditions, SB can cause 15%–20% production losses and may result in seed discoloration, shriveled seeds, and loss of viability (Chattopadhyay et al., 2022; Gupta et al., 2018; Singh et al., 2018). SB is estimated to affect 25 million ha of wheat globally, of which 10 million ha are under the rice–wheat cropping system in the Indian subcontinent alone (Duveiller et al., 2005; Joshi et al., 2007).…”

Section: Introductionmentioning

confidence: 99%

Genome‐wide association mapping for field spot blotch resistance in South Asian spring wheat genotypes

Kamble,

He,

Navathe

et al. 2024

The Plant Genome

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Spot blotch caused by Bipolaris sorokiniana ((Sacc.) Shoemaker) (teleomorph: Cochliobolus sativus [Ito and Kuribayashi] Drechsler ex Dastur) is an economically important disease of warm and humid regions. The present study focused on identifying resistant genotypes and single‐nucleotide polymorphism (SNP) markers associated with spot blotch resistance in a panel of 174 bread spring wheat lines using field screening and genome‐wide association mapping strategies. Field experiments were conducted in Agua Fria, Mexico, during the 2019–2020 and 2020–2021 cropping seasons. A wide range of phenotypic variation was observed among genotypes tested during both years. Twenty SNP markers showed significant association with spot blotch resistance on 15 chromosomes, namely, 1A, 1B, 2A, 2B, 2D, 3A, 3B, 4B, 4D, 5A, 5B, 6A, 6B, 7A, and 7B. Of these, two consistently significant SNPs on 5A, TA003225‐0566 and TA003225‐1427, may represent a new resistance quantitative trait loci. Further, in the proximity of Tsn1 on 5B, AX‐94435238 was the most stable and consistent in both years. The identified genomic regions could be deployed to develop spot blotch‐resistant genotypes, particularly in the spot blotch‐vulnerable wheat growing areas.

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Evaluation of indigenous accessions of wheat for spot blotch resistance at the seedling and adult plant stage

Reddy,

Gurjar,

Kumar

et al. 2023

Indian Phytopathology

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Assessment of wheat genotypes based on genotype-by-environment interaction for durable resistance to spot blotch disease in hot spot

Cited by 4 publications

References 38 publications

Genome-Wide Association Mapping Indicates Quantitative Genetic Control of Spot Blotch Resistance in Bread Wheat and the Favorable Effects of Some Spot Blotch Loci on Grain Yield

Genome-Wide Association Mapping Indicates Quantitative Genetic Control of Spot Blotch Resistance in Bread Wheat and the Favorable Effects of Some Spot Blotch Loci on Grain Yield

Genome‐wide association mapping for field spot blotch resistance in South Asian spring wheat genotypes

Evaluation of indigenous accessions of wheat for spot blotch resistance at the seedling and adult plant stage

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