Genetic Analysis of a Dominant Dwarf Mutant in Maize

doi:10.7668/hbnxb.2010.05.019

Abstract

Abstract: A maize dwarf mutant was observed in progenies derived from Mo17 hybrid. The dwarf mutant is characteristic of shortened internode,abnormal inflorescence,delaying flowering,etc. In the segregating population which were generated from the mutant crossed with different maize inbred lines Mo17,B73,B77 and W22,plants with dwarf and normal phenotype were identified. The segregation ratio is 1(dwarf plants) ∶ 1(normal plants) . Additionally,progenies from normal plants self-pollination are all with normal plant height. Based on the phenotypic data,we speculated that the maize dwarf mutant is controlled by a single dominant gene. Moreover,the dominant dwarf locus was mapped on maize chromosome 2 using the segregating population derived from the mutant crossed with maize inbred line Mo17. This study will lay a foundation for cloning the dwarf mutant gene in the future.

Key words: Maize, Dominant dwarf mutant, Genetics

CLC Number:

S513.03

WANG Yijun, MIAO Nan, SHI Yating, DENG Dexiang, BIAN Yunlong. Genetic Analysis of a Dominant Dwarf Mutant in Maize[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(5): 90-93. doi: 10.7668/hbnxb.2010.05.019.

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