1.The inbred lines contain 28.125 percent of Luda Red Cob Pedigree, 25 percent of tropical maize pedigree, 9.375 percent of Tangsipingtou pedigree and 9.375 percent of Lancaster pedigree and have the highest heterosis with Reid Yellow Dent maize.
4.The results indicated that the water content of maize straw was declined from 68.5% before frost to 60.9% in 10 days after frost, at the same time the water content of the whole green straw was higher than half yellow one and whole yellow one by 0.78% and 5.05%, respectively.
6.According to analysis on germplasm basic of maize hybrids which were developed during the Seventh and Eighth “Five-year Plan”in Henan province,the majority of their parent resources were:Reid Yellow Dent system (A),Tangsipintou system (B),Ludahonggu system and Lancaster system(D).