Gene Details:

• MSU gene ID: None
• RAPdb gene ID: None
• Gene Symbol: Xa4
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• The major disease resistance gene Xa4 confers race-specific durable resistance against Xanthomonas oryzae pv.
• Although Xa4 has been one of the most widely exploited resistance genes in rice production worldwide, its molecular nature remains unknown.
• Strengthening of the cell wall by Xa4 enhances resistance to bacterial infection, and also increases mechanical strength of the culm with slightly reduced plant height, which may improve lodging resistance of the rice plant.
• The simultaneous improvement of multiple agronomic traits conferred by Xa4 may account for its widespread and lasting utilization in rice breeding programmes globally.
• The pyramided line IRBB67 showed no differences in lesion length between both temperature regimes, demonstrating that non-effectiveness of Xa4 at high temperature did not affect IRBB67 resistance.
• Moreover, Xa4 complements Xa7 resistance with no Xoo spread in planta beyond the symptomatic area under both temperature regimes in IRBB67.

Function-related keywords:

• resistance ,  disease ,  disease-resistance ,  culm ,  cell-wall ,  lodging ,  lodging-resistance ,  breeding ,  plant-height ,  temperature ,  xoo ,  lesion

Literature:

• Improvement of multiple agronomic traits by a disease resistance gene via cell wall reinforcement .  DOI:  10.1038/nplants.2017.9 ;  PMID:  28211849
• Rice pyramided line IRBB67 (Xa4/Xa7) homeostasis under combined stress of high temperature and bacterial blight .  DOI:  10.1038/s41598-020-57499-5 ;  PMID:  31959799
• Rapid genotyping of bacterial leaf blight resistant genes of rice using loop-mediated isothermal amplification assay .  DOI:  10.1007/s11033-020-06077-z ;  PMID:  33394228

Related News:

Gene Resources:

• NCBI ID: KU761305  , KU761306  , KU761307  , KU761308  , KU761309  , KU761310  , KU761311  , KU761312  , KU761313
• UniProt accessions:

Sequences: