Table 6 Within-plant genotypic variance in ¹³C-photosynthate partitioning in bolls according to position and node during the period of early flowering to boll-opening stage, the peak flowering to boll-opening stage, and the peak boll-setting to boll-opening stage /%

Early flowering – boll-opening stage

J169

55.26 b

33.56 a

11.18 a

87.03 a

12.97 c

L21

61.19 a

32.38 a

6.43 c

73.77 b

26.23 b

99B

56.65 b

34.06 a

9.29 b

62.71 c

37.29 a

Peak flowering – boll-opening stage

J169

29.34 c

29.73 b

40.93 a

82.89 a

17.11 c

L21

35.74 a

29.56 b

34.70 b

81.85 a

18.15 b

99B

33.67 b

44.69 a

21.65 c

70.87 b

29.13 a

Peak boll-setting – boll-opening stage

J169

28.16 c

29.65 c

42.19 a

86.43 a

13.57 c

L21

30.40 b

41.66 b

27.94 b

72.31 b

27.69 b

99B

36.89 a

46.71 a

16.40 c

64.28 c

35.72 a