Screening And Phenotype Analysis Of Mid-early Maturity And High-yield Maize Hybrid Combination In North Spring Maize Area

In this study,130 maize hybrids from the Anhui Longping High-tech were selected as the tested group,and Jidan 27,Yinongyu 10 and Xinxin 1 were chosen as control group.They were seeded in Fuyu,Shangzhi,Chifeng and Suihua in Heilongjiang,and managed uniformly.The differences were analyzed between the tested group and the control group,including the converted with yield,the count of ears,the moisture content,the fresh weight,the height of the plant,the height of the ear,the rates of non-ear corn stalks,the rates of root lodging and stem broken and so on.The hybrid combination with high-yield of mid-early maturing maize was screened by correlation analysis between characters.The main results were as follows:1.Based on the average converted with yield,53 of 130 corn hybrids were higher than the three control varieties.2.In the 53 high yield hybrids,the moisture content of threshing were generally higher than the control group.Meanwhile,the average converted with yield of L137 hybrid was the highest,and the moisture content of the seed was the 43rd(33.06%)higher than the others in the 130 hybrids.The yielding capacity of L144 hybrid was the fifth higher than the others,and its seed moisture content was slightly less than the Yinongyu 10(27.98% vs 25.84 %).3.For the rates of non-ear corn stalks,the rates of stem broken,the count of ears,the fresh weight and the converted with yield,no significant difference between the 53 hybrids and the control group was observed,as well as the height of the plant and the ear,the rates of root lodging and the moisture content between some hybridization and the control group.4.Between 53 hybridization combination and 3 control traits,their yield was positively correlated with the fresh weight significantly,the moisture content of grain was also significantly positively correlated with the rates of stem broken and the fresh weight,while it was significantly negatively correlated with plant height and ear number.5.The yield of mid-early maturity hybrid combinations L137 and L144 was higher than many other hybrids,and their agronomic characters have better comprehensive performance.So they were promising for market promotion.