Primary spikelets

Secondary spikelets

Spikelets

Treatment

Surviving spikelets

Retrograde spikelets

Differentiated spikelets

Retrograde percentage (%)

Surviving spikelets

Retrograde spikelets

Differentiated spikelets

Retrograde percentage (%)

Surviving spikelets

Retrograde spikelets

Differentiated spikelets

Retrograde percentage (%)

Chongzhou

S1V1

69.73^ab

6.97^ab

76.69^a

9.10^ab

179.99^b

27.10^cd

207.09^b

13.05^de

249.71^b

34.07^bcd

283.78^b

11.98^cd

S1V2

64.69^cd

1.17^fg

65.86^c

1.77^e

141.06^d

31.13^bc

172.19^c

18.07^bc

205.75^d

32.29^cde

238.05^cd

13.57^bcd

S1V3

63.67^cd

4.80^cd

68.47^bc

6.98^bc

155.54^cd

21.59^d

177.14^c

12.34^e

219.21^cd

26.40^de

245.61^cd

10.79^d

S1V4

63.79^cd

3.26^de

67.05^c

4.90^cd

139.97^d

20.94^d

160.91^cd

12.98^de

203.76^d

24.20^e

227.95^de

10.64^d

S2V1

70.47^a

8.56^a

79.03^a

10.83^a

206.14^a

58.71^a

264.84^a

22.26^ab

276.61^a

67.26^a

343.87^a

19.60^a

S2V2

66.73^bc

0.89^g

67.62^c

1.33^e

111.07^e

34.88^bc

145.95^d

23.91^a

177.81^e

35.77^bc

213.57^e

16.75^ab

S2V3

62.67^d

6.00^bc

68.67^bc

8.74^ab

175.05^bc

35.31^b

210.36^b

16.77^cd

237.72^bc

41.31^b

279.03^b

14.78^bc

S2V4

68.49^ab

2.78^ef

71.2^b

3.90^de

151.12^d

32.00^bc

183.12^c

17.47^c

219.60^cd

34.78^bc

254.39^c

13.67^bcd

Mean

66.28

4.30

70.58

5.94

157.49

32.71

190.20

17.11

223.77

37.01

260.78

13.97

F-value

S

3.33

1.58

8.10*

0.76

1.71

68.01**

17.35**

35.41**

2.68

70.07**

21.52**

36.91**

V

10.41**

51.51**

43.93**

40.06**

31.13**

16.15**

41.68**

8.37**

35.31**

25.32**

55.69**

5.85**

S × V

1.83

1.64

1.23

1.51

6.05**

10.51**

11.41**

1.20

5^,86**

11.65**

11.80**

2.15

Hanyuan

S1V1

60.80^ab

10.79^a

71.60^a

15.06^a

177.95^a

29.68^b

207.63^a

14.34^d

238.75^a

40.47^bc

279.23^a

14.51^d

S1V2

57.12^bc

2.79^d

59.91^d

4.70^cd

101.71^de

37.13^b

138.58^cd

26.85^a

158.84^cd

39.92^bc

198.49^ef

20.16^abc

S1V3

51.27^d

7.94^bc

59.15^de

13.42^a

143.36^b

51.32^a

194.67^ab

26.30^ab

194.57^b

59.25^a

253.83^bc

23.32^ab

S1V4

54.55^cd

7.63^c

62.18^cd

12.29^ab

122.46^c

32.27^b

154.73^c

20.83^bc

177.01^bc

39.90^bc

216.91^de

18.4^bcd

S2V1

59.17^abc

9.45^ab

68.58^ab

13.79^a

167.27^a

37.37^b

204.65^a

18.24^cd

226.40^a

46.82^b

273.22^ab

17.13^cd

S2V2

54.84^cd

1.01^e

55.85^e

1.83^d

100.80^e

32.01^b

132.81^d

24.27^ab

155.64^d

33.03^c

186.66^f

17.60^cd

S2V3

59.05^abc

6.64^c

65.68^bc

10.13^b

130.62^bc

53.31^a

183.93^b

28.82^a

189.66^b

59.95^a

249.61^c

23.87^a

S2V4

63.76^a

4.03^d

67.79^b

6.00^c

120.17^cd

38.37^b

158.54^c

24.32^ab

183.93^b

42.40^bc

226.33^d

18.76^bcd

Mean

57.57

6.29

63.84

9.65

133.04

38.93

171.94

23.00

190.60

45.22

235.54

19.22

F-value

S

9.61**

25.46**

2.15

26.36**

2.49

0.92

0.70

1.55

0.58

0.06

0.30

0.049

V

5.00*

74.12**

39.81**

50.97**

51.07**

10.40**

45.64**

11.12**

50.12**

12.87**

54.50**

8.74**

S × V

8.33**

1.86

11.97**

2.45

0.49

1.06

0.42

1.03

0.80

0.99

0.74

0.952