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Table 2 Chi squared analysis of barley populations for tests for allelism with RphCantala

From: Genetic mapping of a new race specific resistance allele effective to Puccinia hordei at the Rph9/Rph12locus on chromosome 5HL in barley

Population

Genes involved

Pop

No. of F 3families

Genetic ratio

P value

Chi square

   

NSR

Seg

NSS

   

Cantala/Triumph

RphC/Rph12

F3

208

  

No segregation#

<0.0001

267.429a

Cantala/PI531849

RphC/Rph13

F3

69

71

10

7:8:1

0.807

0.429a

Cantala/Estate

RphC/Rph3

F3

112

87

18

7:8:1

0.012

8.779a

Cantala/Cebada Capa

RphC/Rph7

F3

72

107

8

7:8:1

0.117

4.290a

Stirling/CI9214

RphC/Rph1

DH

121

 

137

1:1

0.319

0.992b

  1. Maximum recombination r = 1.1 cM (P = 0.01) and r = 0.7 cM (P = 0.05) calculated from Hanson [32] based on the hypothesis that the two loci are different.
  2. #Chi squared values are denoted a and b for 2 and 1 degrees of freedom, respectively.