Changes on Sugar and Starch Contents during Seed Development of Synergistic Sweet Corn and Implication on Seed Quality

Table 2

Regression equations between seed quality and carbohydrate characters during seed developments of sweet corn.

Inbreds/hybrid	Parameters	Regression equations	R^2
101LTSC-10	GP	Y = 121.902 − 0.568X11 − 28.876X2 + 33.009X3 − 0.100X4 − 5.362X5 + 4.787X6 (b0 = 0.137; b1 = 0. 137; b2 = 0. 006; b3 = 0.007; b4 = 0.581; b5 = 0.005; b6 = 0.006)	0.950
	GI	Y = −11.367 − 1.345X1 − 4.916X2 + 3.127X3 + 1.352X4 − 0.060X5 + 3.061X6 (b0 = 0.769; b1 = 0.430; b2 = 0.274; b3 = 0.493; b4 = 0.441; b5 = 0.901; b6 = 0.015)	0.990
	MGT	Y = 33.156 + 0.888X1 − 0.536X2 + 2.512X3 − 1.137X4 − 3.026X5 − 5.104X6 (b0 = 0.050; b1 = 0.100; b2 = 0.252; b3 = 0.080; b4 = 0.083; b5 = 0.050; b6 = 0.041)	0.909
	EC	Y = 58.586 + 0.120X1 + 0.075X2 + 1.250X3 − 0.773X4 + 1.023X5 − 1.333X6 (b0 = 0.044; b1 = 0.977; b2 = 0.933; b3 = 0.920; b4 = 0.862; b5 = 0.050; b6 = 0.048)	0.956
C4	GP	Y = 239.896 + 16.535X1 + 6.297X2 + 16.918X3 − 5.138X4 − 1.294X5 − 1.370X6 (b0 = 0.026; b1 = 0.013; b2 = 0.303; b3 = 0.006; b4 = 0.436; b5 = 0.077; b6 = 0.014)	0.962
	GI	Y = −53.865 + 1.007X1 + 0.485X2 − 0.076X3 − 0.134X4 − 1.717X5 + 1.059X6 (b0 = 0.028; b1 = 0.049; b2 = 0.612; b3 = 0.846; b4 = 0.801; b5 = 0.045; b6 = 0.048)	0.993
	MGT	Y = 37.957 − 0.851X1 − 0.587X2 − 0.194X3 − 0.326X4 + 0.439X5 + 3.144X6 (b0 = 0.035; b1 = 0.464; b2 = 0.675; b3 = 0.726; b4 = 0.680; b5 = 0.387; b6 = 0.023)	0.717
	EC	Y = 242.884 − 15.349X1 − 12.365X2 − 7.656X3 + 9.392X4 − 5.395X5 − 3.333X6 (b0 = 0.323; b1 = 0.028; b2 = 0.042; b3 = 0.296; b4 = 0.348; b5 = 0.356; b6 = 0.534)	0.909
TSC/H3-7	GP	Y = 196.365 − 10.760X1 − 15.779X2 − 12.687X3 + 11.668X4 + 1.589X5 − 2.226X6 (b0 = 0.165; b1 = 0.147; b2 = 0.091; b3 = 0.119; b4 = 0.123; b5 = 0.712; b6 = 0.529)	0.998
	GI	Y = 0.665 − 2.271X1 − 2.193X2 − 2.017X3 + 2.127X4 − 1.116X5 + 0.791X6 (b0 = 0.987; b1 = 0.384; b2 = 0.361; b3 = 0.403; b4 = 0.374; b5 = 0.678; b6 = 0.6931)	0.909
	MGT	Y = 10.503 − 0.501X1 − 0.337X2 + 0.153X3 − 0.326X4 + 0.841X5 + 0.460X6 (b0 = 0.024; b1 = 0.191; b2 = 0.252; b3 = 0.491; b4 = 0.283; b5 = 0.151; b6 = 0.203)	0.993
	EC	Y = 95.160 + 7.991X1 + 5.523X2 − 1.224X3 − 4.721X4 + 16.616X5 − 10.884X6 (b0 = 0.457; b1 = 0.299; b2 = 0.369; b3 = 0.803; b4 = 0.420; b5 = 0.194; b6 = 0.219)	0.995
P4546/Delec-1	GP	Y = −291.594 − 3.652X1 + 0.387X2 + 0.451X3 − 3.041X4 + 2.542X5 + 4.214X6 (b0 = 0.057; b1 = 0.474; b2 = 0.916; b3 = 0.853; b4 = 0.455; b5 = 0.350; b6 = 0.149)	0.998
	GI	Y = −45.084 − 2.726X1 − 0.920X2 − 1.303X3 + 1.900X4 − 0.901X5 + 0.450X6 (b0 = 0.066; b1 = 0.138; b2 = 0.329; b3 = 0.165; b4 = 0.154; b5 = 0.242; b6 = 0.6931)	0.996
	MGT	Y = 1.503 − 0.501X1 − 0.337X2 + 0.153X3 − 0.326X4 + 0.841X5 + 0.060X6 (b0 = 0.024; b1 = 0.191; b2 = 0.252; b3 = 0.491; b4 = 0.283; b5 = 0.151; b6 = 0.169)	0.990
	EC	Y = 95.160 + 7.991X1 + 5.523X2 − 1.224X3 − 4.721X4 + 6.616X5 − 1.884X6 (b0 = 0.457; b1 = 0.299; b2 = 0.369; b3 = 0.803; b4 = 0.420; b5 = 0.134; b6 = 0.982)	0.998
Dr. Pek’s 1351	GP	Y = 17.374 − 2.394X1 + 4.318X2 − 0.441X3 − 7.201X4 + 4.807X5 − 1.345X6 (b0 = 0.007; b1 = 0.582; b2 = 0.317; b3 = 0.709; b4 = 0.077; b5 = 0.690; b6 = 0.787)	0.996
	GI	Y = −36.506 + 0.299X1 + 0.435X2 − 0.048X3 + 0.466X4 − 0.349X5 − 0.0 81X6 (b0 = 0.030; b1 = 0.285; b2 = 0.202; b3 = 0.620; b4 = 0.074; b5 = 0.609; b6 = 0.776)	0.998
	MGT	Y = −0.545 − 0.044X1 − 0.093X2 + 0.032X3 − 1.00X4 + 0.083X5 + 0.095X6 (b0 = 0.974; b1 = 0.714; b2 = 0.494; b3 = 0.601; b4 = 0.557; b5 = 0.836; b6 = 0.611)	0.976
	EC	Y = 70.044 − 0.032X1 − 5.056X2 − 1.234X3 + 1.753X4 − 8.040X5 − 3.505X6 (b0 = 0.900; b1 = 0.993; b2 = 0.344; b3 = 0.558; b4 = 0.737; b5 = 0.585; b6 = 0.578)	0.923

Note: GP, germination percentage; GI, germination index; MGT, mean germination time; and EC, electrical conductivity. X₁, X₂, X₃, X₄, X₅, and X₆ were sucrose, glucose, fructose, total sugar content, amylopectin, and total starch content, respectively; b₀, b₁, b₂, b₃, b₄, b₅, and b₆ were values for intercept, X₁, X₂, X₃, X₄, X₅, and X₆, respectively.