| Popcorn has rich nutritional components and diverse health functions,which are increasingly favored by people.In this study,90 popcorn inbred lines were subjected to phenotypic trait cluster analysis and SSR cluster analysis,14 inbred lines with large genetic differences were selected as parents,45 hybrid combinations were designed and assembled according to Zengguang NC II,and heterosis analysis,correlation analysis,combining ability analysis and principal component analysis were carried out for their main characters.The results are as follows:1.There were significant differences in plant height and spike height among 90 inbred lines of popcorn.2.Using UPGMA clustering analysis on phenotypic traits of 90 popcorn inbred lines,they were divided into four major groups;90 popcorn inbred lines were divided into five groups by SSR cluster analysis using molecular genetic marker.3.In this experiment,18 main characters of 45 hybrid combinations were analyzed for heterosis.The combination with higher heterosis was ZM2 × ZF3、ZM6 × ZF4、ZM3 × ZF1。4.This experiment found through correlation research that there is a highly significant positive correlation between the explosion rate and the expansion factor;The weight of 100 grains is highly significantly positively correlated with the yield of the plot,while it is highly significantly negatively correlated with the expansion factor;There is a highly significant positive correlation between single spike weight and spike length,spike diameter,spike rows,row grains,axle weight,axle diameter,hundred grain weight,and plot yield.5.The analysis of combining ability shows that ZM4 and ZF5 can be used as parents for breeding high-yield popcorn hybrids;ZM3 and ZF2 can be used as parents for breeding hybrid varieties with good burst traits.6.Principal component analysis obtains the excellent hybrid combination based on the overall score in descending order ZM8×ZF1、ZM5×ZF5、ZM9×ZF2、ZM4×ZF1、ZM2×ZF2、ZM3×ZF2。... |
