2JI Liang-yue, HU YAN-min, LI Yong-liang, HUANG Su-xiang, JI Hong-qiang and HUANG Xi-lin( College of Agronomy, Henan Agricultural University, Zhengzhou 450002 , P.R. China Science Committee of Jiaozuo , Jiaozou 454002 , P. R . China ).Studies on the Recross Heterosis Effect of Male-sterile Single-hybrids in Corn[J].Agricultural Sciences in China,2002,1(5):491-497.
6Gracen V E.Diversity and suitability for hybrid production of different source of cytoplasmic male sterility in maize [J].Agronomy journal,1974,66(9,10):654-657.
