Genetic relationships of soybean mutants for different linolenic acid contents

Shaikh M. Rahman, Takehito Kinoshita, Toyoaki Anai, Susumu Arima, Yutaka Takagi

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34 Citations (Scopus)


The normal content (80-90 g kg-1) of linolenic acid in soybean [Glycine max (L.) Merr.] oil adversely affects oil flavor and stability. A new mutant (M-24) with lower linolenic acid content (62 g kg-1) was developed by x-ray irradiation. Our objective was to determine the inheritance of linolenic acid content in M-24 and to determine the genetic relationships of this trait with the fan and fanx loci known to control linolenic acid in M-5 and KL-8 mutants, respectively. Reciprocal crosses were made between each mutant and 'Bay', and among the three mutants. No maternal or cytoplasmic effects were observed in any of the crosses. Data from F: seeds of the cross M-24 x Bay indicated that linolenic acid content in M-24 was controlled by an allele at a single locus with no dominance effects. In the cross of M-24 x KL-8, F2 segregation indicated that linolenic acid content in M-24 and KL-8 was controlled by two different alleles at the same locus. For the M-5 x M-24 cross, F2 segregation patterns and the segregation of F3 seeds from individual F2 plants indicated that M-5 and M-24 mutants have alleles at different independent loci that control linolenic acid content. Therefore, the allele in M-24 is designated as fanx (M-24) to distinguish it from those of fan (M-5) and fanx (KL-8). The segregate with the fanfanfanx'fanx' genotype can be considered as an important germplasm that can reduce the linolenic acid content in soybean oil.

Original languageEnglish
Pages (from-to)702-706
Number of pages5
JournalCrop Science
Issue number3
Publication statusPublished - 1998
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science


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