Table 1 Phenotypic ratios, chi squared analysis and Sr gene postulation for response to six Puccinia graminis races tested on the RL6071/Tr129 DH population.

From: Origin and genetic analysis of stem rust resistance in wheat line Tr129

Race

Code

Observed

Single gene ratio (1:1)

Two gene ratio (3:1)

Sr gene postulation

Resc

Susc

χ2d

pe

χ2

p

TTKSK

A

146

122

2.15

0.14

–

–

SrTr129

RRTTFa

B

68

21

–

–

0.09

0.76

SrTr129 + Sr8a

QTHJFa

C

70

25

–

–

0.08

0.77

SrTr129 + Sr7b

QTHJFb

C

45

48

0.1

0.76

–

–

Sr7b

TMRTFa

D

51

44

0.52

0.47

–

–

Sr8a

TPMKC

E

114

151

5.17

0.02

  

Sr9b

MCCFC

F

192

67

–

–

0.10

0.75

Sr8a + Sr9b

  1. aPhenotypic data for a random subset of the DH population (Subset 1).
  2. bPhenotypic data for a subset of lines lacking resistance to race A (Subset 2).
  3. cRes resistant, Sus susceptible.
  4. dChi-squared value.
  5. ep-value for the chi-squared value.
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