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The Journal of Heredity 1988:79(6):476-478
© 1988 The American Genetic Association 79:476-478

other

Two Genes That Confer Ineffective Nodulation in Chickpea (Cicer arietinum L.)

T. M. Davis

Plant Science Department, University of New Hampshire Durham

Address reprint requests to Dr Davis, Plant Science Dept., Nesmith Hall, University of New Hampshire, Durham, NH 03824

Abstract

Genetic analysis of the ineffectively nodulating radiation-induced chickpea mutants PM405 and PM796 revealed two new recessive, nonallelic root nodulation genes. In PM405, the m4 gene determined the formation of small white nodules; in PM796, the m5 gene determined the formation of nodules that were green except for a narrow band apparent leghemoglobin pigmentation near the nodule tip. Recessive epistasis was evident in crosses between PM405 and PM796. F2 segregation data fit the expected ratio of 9 wild type: 3 PM796 type: 4 PM405 type.


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