Table 2 Mean squares of the wheat genotypes evaluated for stem rust (SR), yellow rust (YR), grain yield (GY) and yield related traits during MS2019 and OS2020 at KALRO, Njoro.

From: Identification of bread wheat genotypes with superior grain yield and agronomic traits through evaluation under rust epiphytotic conditions in Kenya

Source of variation

df

Expected mean squares

YRAud

SRAud

TKW

GY

SS

DH

Season

1

δ2ε + 336 δ2b + 7056 δ2r + 21,168 δ2s

561,944.44**

1,825,888.69**

27,575.79*

275.79*

126.93*

1800.01*

Replicates/season

4

δ2ε + 336 δ2b + 7056 δ2r

9833.77***

52,005.60***

28.53***

24.62*

6.60**

102.79***

Blocks/replicates × season

120

δ2ε + 336 δ2b

1230.63

7333.30*

2.57

0.60*

1.43

4.99

Genotypes

167

δ2ε + 126 δ2sg + 256 δ2g

45,963.70***

653,376.30***

82.67***

7.74***

3.56*

126.40***

Season × genotypes

167

δ2ε + 126 δ2sg

3417.56***

34,905.20***

10.49***

1.88***

2.72***

17.70***

Error

548

δ2ε

1161.60

5600.20

2.17

0.48

1.30

4.79

CV (%)

  

30.96

22.98

6.48

17.69

6.32

2.94

R2

  

0.94

0.98

0.94

0.90

0.68

0.92

Source of variation

df

Expected mean squares

PH

SL

KS

BM

HI

 

Season

1

δ2ε + 336 δ2b + 7056 δ2r + 21,168 δ2s

1148.59*

0.78

61.85

9274.36

0.02

 

Replicates/season

4

δ2ε + 336 δ2b + 7056 δ2r

54.48*

10.80***

632.84***

2405.04***

0.07***

 

Blocks/replicates × season

120

δ2ε + 336 δ2b

17.37

0.31

56.06*

28.98

0.00

 

Genotypes

167

δ2ε + 126 δ2sg + 256 δ2g

56.32***

1.60***

85.81

234.96***

0.01***

 

Season × genotypes

167

δ2ε + 126 δ2sg

31.97***

0.58***

73.81***

59.25***

0.00***

 

Error

548

δ2ε

14.75

0.25

43.42

23.20

0.00

 

CV (%)

  

4.33

5.29

14.45

16.36

20.21

 

R2

  

0.72

0.78

0.61

0.86

0.83

 
  1. YRAud yellow rust area under disease progress curve (AUDPC), SRAud stem rust AUDPC, TKW thousand kernel weight, GY grain yield, SS number of spikelets spike−1, DH days to 50% heading, PH plant height, SL spike length, KS number of kernels spike−1, BM biomass, HI harvest index, CV coefficient of variation, R2 coefficient of determination. The expected mean squares determined the random error as a test for the blocks and the genotype × season effects, the replicates as an error term to test the effects due to seasons, the genotype × season as an error term to test the effect due to genotypes and blocks as an error term to test the effect due to replicates; ***, ** and * = significance at p < 0.001, p < 0.01 and p < 0.05, respectively.
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