Evidence map›Paper›PMID 42321633›Full record

ArticleBMC plant biology2026

Resistance architecture and breeding implications of blast and bacterial blight resistance genes in core WDR parents.

Zhening Miao, Jijin Chen, Deyan Kong, Jiahong Chen, Ziming Li, Xinqiao Yu, Hui Xia, Lijun Luo, Yi Liu

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Article in BMC plant biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

9 authors.

Zhening Miao *Guangdong Basic Research Center of Excellence for Precise Breeding of Future Crops, Guangdong Laboratory for Lingnan Modern Agriculture, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China.
Jijin Chen *Ministry of Agriculture and Rural Affairs, Shanghai Agrobiological Gene Center, Key Laboratory of Grain Crop Genetic Resources Evaluation and Utilization, Shanghai, 201106, China.
Deyan KongMinistry of Agriculture and Rural Affairs, Shanghai Agrobiological Gene Center, Key Laboratory of Grain Crop Genetic Resources Evaluation and Utilization, Shanghai, 201106, China.
Jiahong ChenMinistry of Agriculture and Rural Affairs, Shanghai Agrobiological Gene Center, Key Laboratory of Grain Crop Genetic Resources Evaluation and Utilization, Shanghai, 201106, China.
Ziming LiMinistry of Agriculture and Rural Affairs, Shanghai Agrobiological Gene Center, Key Laboratory of Grain Crop Genetic Resources Evaluation and Utilization, Shanghai, 201106, China.
Xinqiao YuGuangdong Basic Research Center of Excellence for Precise Breeding of Future Crops, Guangdong Laboratory for Lingnan Modern Agriculture, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China.
Hui XiaGuangdong Basic Research Center of Excellence for Precise Breeding of Future Crops, Guangdong Laboratory for Lingnan Modern Agriculture, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China.
Lijun LuoGuangdong Basic Research Center of Excellence for Precise Breeding of Future Crops, Guangdong Laboratory for Lingnan Modern Agriculture, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China.
Yi LiuMinistry of Agriculture and Rural Affairs, Shanghai Agrobiological Gene Center, Key Laboratory of Grain Crop Genetic Resources Evaluation and Utilization, Shanghai, 201106, China. ly07@sagc.org.cn.

Funding

National Key Research and Development Program of China 2024YFD2300500Shanghai Agriculture Applied Technology Development Program No.T2025203
6 · The paper itself

Abstract

backgroundWater-saving and drought-resistance rice (WDR) is crucial for sustainable cultivation under water scarcity, yet its productivity is increasingly compromised by rice blast and bacterial blight (BB). A systematic assessment of resistance gene deployment in elite WDR parents is urgently needed to guide resistance breeding.

resultsWe dissected the resistance architecture of 47 core WDR parental lines by genotyping 11 blast and 4 BB resistance genes. For blast, Ptr was nearly fixed (97.9%), whereas loci previously reported to confer broad-spectrum blast resistance, such as Pigm (0%) and Pi9 (19.1%), were scarce. Blast resistance scores correlated negatively with gene number (ρ = -0.330, P = 0.023). For BB, resistance genes were only detected in 34.0% of lines, mainly restorers, with Xa23 (21.3%) and Xa7 (23.4%) being most frequent. The recessive gene xa5 was absent, and Xa21 (8.5%) was rare. BB resistance exhibited a strong negative correlation with gene count (ρ = -0.771, P < 0.001).

conclusionsResistance-associated loci were unevenly distributed in the WDR breeding panel, with apparent gaps in loci previously associated with durable or broad-spectrum resistance. These findings provide a preliminary basis for genotype-guided parental selection and marker-assisted pyramiding strategies in WDR breeding. Previous resistance-oriented improvement of elite restorers further suggests the potential value of integrating resistance-locus profiling with breeding design.

Indexed as

Disease ResistanceGenes, PlantOryzaPlant DiseasesDrought ResistanceGenotypePlant BreedingBacterial blight (BB)Marker-assisted selection (MAS)Resistance gene distributionRice blastWater-saving and drought-resistance rice (WDR)

Identifiers

PMID42321633
PMCPMC13527963

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