4Greech R G, McArale F J. C, ene interaction for quantitative changes in carbohydrates in maize kernels[J]. Crop Sci., 1962(6): 193-194.
5Garwood D L, Shannon J C, Greech R G. Starch of endosperm possessing different alleles at the amylase extender locus in zea mays L [J].Cereal Chem., 1976(53): 335-336.