The genetic basis of plants’ battle against witchweeds: linking immune responses to distinct resistance mechanisms

Jhu, Min-Yao; Kawa, Dorota; Brady, Siobhán M

doi:10.1093/jxb/erad305

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2024

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Cited by 2 publications

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Crop Wild Relatives of Sorghum: A Novel Source of Genetic Variation for Crop Improvement

Vetriventhan,

Jagadeesh,

Baraskar

et al. 2024

Omics and Biotechnological Approaches for Product Profile-Driven Sorghum Improvement

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Crop Wild Relatives of Sorghum: A Novel Source of Genetic Variation for Crop Improvement

Vetriventhan,

Jagadeesh,

Baraskar

et al. 2024

Omics and Biotechnological Approaches for Product Profile-Driven Sorghum Improvement

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Exploring the genetic variability of sudanese wild sorghum (sorghum bicolor (L.) moench) germplasm for post-attachment striga hermonthica resistance mechanisms using single sequence repeat (SSR) primers

Ahmed,

Elsafy,

Zhourghane

et al. 2024

Genet Resour Crop Evol

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Striga hermonthica, a parasitic weed, poses a significant threat to sorghum production in sub-Saharan Africa, potentially causing yield losses of up to 100%. Identifying sources of Striga resistance trait within the diverse wild sorghum accessions is imperative to developing resistant sorghum cultivars. This study analyzed the genetic variation of 255 Sudanese wild sorghum accessions using simple sequence repeat (SSR) markers associated with post-attachment Striga resistance mechanisms: nine SSR markers linked to mechanical barrier resistance and two to hypersensitive resistance. We found moderate polymorphism in the Striga resistance loci among the Sudanese wild sorghum accessions, with polymorphic information contents (PIC) ranging from 0.03 to 1.92 for hypersensitivity and 0.37 for mechanical barrier resistance mechanism markers. Overall, 18 alleles were detected within the loci for mechanical barrier markers and four for hypersensitive markers. A population structure and cluster analysis revealed that several accessions were closely linked to the resistant checks N13 (mechanical barrier) and Framida (hypersensitivity response). Analysis of molecular variance (AMOVA) showed substantial polymorphism within the population (99% for mechanical barriers and 94% for hypersensitivity), thus indicating that these wild sorghum accessions harbor ready-to-use genes for improving Striga resistance in sorghum. Our findings highlight the merits of Sudanese wild sorghum germplasm for post-attachment Striga resistance mechanisms, indicating their possible use in sorghum breeding efforts to develop Striga resistant cultivars.

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The genetic basis of plants’ battle against witchweeds: linking immune responses to distinct resistance mechanisms

Abstract: This article comments on: Mutinda S, Mobegi FM, Hale B, Dayou O, Ateka E, Wijeratne A, Wicke S, Bellis ES, Runo S. 2023. Resolving intergenotypic Striga resistance in sorghum. Journal of Experimental Botany 74, 5294–5306.

Cited by 2 publications

References 41 publications

Crop Wild Relatives of Sorghum: A Novel Source of Genetic Variation for Crop Improvement

Crop Wild Relatives of Sorghum: A Novel Source of Genetic Variation for Crop Improvement

Exploring the genetic variability of sudanese wild sorghum (sorghum bicolor (L.) moench) germplasm for post-attachment striga hermonthica resistance mechanisms using single sequence repeat (SSR) primers

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