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Table 3 Cosegregation of RYMV resistance and allelic state on CPR5–1

From: Allele mining unlocks the identification of RYMV resistance genes and alleles in African cultivated rice

  Phenotype and genotype
F2 population Total rymv2-Rx Htz Rymv2-S1
Og133 (rymv2-R2) x Og431 (Rymv2-S1) 11 R, 50S (p = 0,23) 10 R 22 S 3 S
Og133 (rymv2-R2) x Tog7291 (rymv2-R1) 55 R, 1S    
Og183 (rymv2-R3) x Og82 (Rymv2-S1) 14 R, 36 S (p = 0,62) 14 R 26 S 10 S
Og213 (rymv2-R4) x Og82 (Rymv2-S1) 13 R, 42 S (p = 1) 13 R 31 S 11 S
Og213 (rymv2-R4) x Tog7291 (rymv2-R1) 100 R    
Og491 (rymv2-R5) x Og431 (Rymv2-S1) 24 R, 47 S (p = 0,10) 21 R 3 R, 30 S 17 S
Og491 (rymv2-R5) x Tog7291 (rymv2-R1) 56 R    
Og256 (rymv2-R6) x Og82 (Rymv2-S1) 18 R, 52 S (p = 0,89) 18 R, 2S 37 S 13 S
Og256 (rymv2-R6) x Tog7291 (rymv2-R1) 45 R    
  1. F2 plants were evaluated for RYMV resistance based on symptom observations. The phenotype is indicated with R for resistant plants and S for susceptible ones. For populations derived from crosses with Og82 and Og431 susceptible accessions, the observed phenotypic segregation was compared to a 1R/3S segregation ratio, based on a binomial exact test. For these populations, genotyping on the CPR5–1 gene was generally performed on all plants with CAPS or dCAPS markers, except for the (Og133 x Og431) population for which genotyping was based on Sanger sequencing and only performed on a subset of 35 plants. The genotype is indicated as “rymv2-Rx” for plants homozygous for alleles rymv2-R2 to -R6, “Rymv1-S1” for plants homozygous for the Rymv1-S1 allele, and Htz for heterozygous plants. F2 plants derived from crosses with Tog7291 were not genotyped