Table 2.

Mean 1,000-grain weights for six cytoplasms averaged across three nuclear backgrounds of indica rice

Cytoplasm	1,000-grain weight (g)	Significance testsa
		P = 0.05	P = 0.01
Nantehao	25.6	a	A
Dijiawujian	24.9	ab	AB
Zhuzhan	24.8	abc	AB
Shenglixian	24.7	abc	AB
Aizizhan	24.5	bc	AB
Peta	24.0	c	B

^a Values followed by the same letter are not significantly different. Lower-case letters indicate significant differences at P = 0.05, upper-case at 0.01