Screening Of The High-Starch Maize Hybrid Combination And Systematic Review Of Their Parents

In this study, high yield and high starch corn breeding are the main direction.We select the15high starch content and good agronomic characters, high yield inbred lines, high-starch corn varieties Sidan19as control.We use NCⅡ genetic mating design group with.A comparative analysis of54crosses the starch content and other quality traits, agronomic traits and the control. Elite maize hybrid combinations in order to filter out the high yield and high starch content.And its quality and agronomic traits of15parental inbred lines combining ability test, and then combining ability effect of cluster analysis.We use SRAP markers to molecular clustering, groups classification and evaluation of elite inbred lines.We provide technical support for the rich in high yield and high starch corn germplasm evaluation and resource materials.The main conclusions in this paper are as following:1. In this study, the excellent corn hybrids Sidan19control,54crosses the nine agronomic and quality traits were analyzed by analysis of variance screened three high yield and starch content portfolio,PH09B×B73(Crude starch content of75.53%, grain weight per spike for244.52g), L09-07×B73(Crude starch content of74.68%, grain weight per spike for236.42g)、L09-07xYe478(Crude starch content of75.20%, grain weight per spike for242.85g).2. To determining the GCA for each character, then selected the parental and combination with high GCA, and SCA for each character to. According to the purpose of this study, GCA positive effect value order sorting for Crude starch content were:B73,853, PH2VK, PH224,PH09B, Ye478, Ye107, L09-07. GCA positive effect value order for single spike kernel weight were:PH09B, L09-07、Mo17、PH224、GY246、Ye478、Ji853、L09-09. L09-07xYe478has greater advantages than L09-07×B73and PH09B×B73in high grain yield and crude starch content of genetically.3. Total combining ability effect of clustering results with molecular cluster was roughly the same, the first category will be the parent to parent PH09B,L09-21, L09-09, PH2VK, PH224, PH6JM, B73, Ye478together. Taxon is Reid population,Two clustering results GY237are always together with Ji853. Taxon is Tangsipingtou base. The third groups of molecular clustering L09-11, L09-07and MO17in the general combining ability clustering are gathered in the second taxa.Taxon is a group of Lancaster.The difference in molecular clustering tuck Ye107separate clustered into one group, the total combining ability clustering is classified in the first category. GY246clustering analysis of the total combining ability L09-11、 L09-07and Mo17together in molecular clustering GY246and GY237and Ji853poly together.