Genetic Analysis on Kernel Row Number and Kernel Number Per Row by Using Six Generations of Two Crosses Made from Inbred Lines Newly Bred in Maize(Zea mays L.)

doi:10.7668/hbnxb.2010.05.022

Abstract

Abstract: There were great differences in general combining ability of kernel row number and kernel number per row in maize(Zea mays L. ) among inbred lines newly bred by Institute of Agricultural Sciences of the Area Along Yangtse of Jiangsu Province. It is helpful to improve the inbred lines continuously to analyze distributions of favorable alleles among the inbred lines. Genetic analysis for kernel row number and kernel number per row were conducted by using mixed major gene plus polygene inheritance models and joint segregation analytic method of P1,P2,F1,B1,B2 and F2 generations in two crosses made from the 3 inbred lines. Kernel row number was controlled by one additivedominance major-gene and additive-dominance-epistasis polygenes,and was mainly governed by polygenes in cross S1 S3; whereas in cross S3 S7 the trait was controlled by two additive-dominance-epistasis major-genes and additive-dominance-epistasis polygenes,and was mainly governed by major genes. Kernel number per row was controlled by one additive major-gene and additive-dominance polygenes,and was mainly governed by major gene in both crosses. Total effect of dominance was larger than that of additive in polygene loci. The results suggest that improvement of kernel row number would be more effective than that of kernel number per row in inbred lines by pyramiding favorable alleles.

Key words: Inbred lines in maize, Kernel row number, Kernel number per row, Mixed major genes plus polygene inheritance mode1, Joint segregation analysis

CLC Number:

S513.03

SHI Mingliang, JIANG JianhuaLIANG KuiGUO, YuanXUE Lin, HU Jiaru, HUANG Xiaolan, HONG Delin1. Genetic Analysis on Kernel Row Number and Kernel Number Per Row by Using Six Generations of Two Crosses Made from Inbred Lines Newly Bred in Maize(Zea mays L.)[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(5): 104-111. doi: 10.7668/hbnxb.2010.05.022.

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