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Plus tree of Cryptomeria japonica D. Don with a heterozygous male-sterility gene

Authors
  • Saito, Maki1
  • Taira, Hideaki2
  • 1 Toyama Forestry and Forest Products Research Center, Forest Experiment Station, 3 Yoshimine, Tateyama-machi, Nakaniikawa-gun, Toyama, 930-1362, Japan , Toyama
  • 2 Biosphere Course, Niigata University Graduate School of Science and Technology, Niigata, Japan , Niigata
Type
Published Article
Journal
Journal of Forest Research
Publisher
Springer-Verlag
Publication Date
Oct 01, 2005
Volume
10
Issue
5
Pages
391–394
Identifiers
DOI: 10.1007/s10310-005-0157-8
Source
Springer Nature
Keywords
License
Yellow

Abstract

To find plus tree clones of Cryptomeria japonica that are heterozygous for a male-sterility gene (Aa), we crossed a homozygous male-sterile tree (aa) with 63 clones. Male sterility in this case is controlled by a recessive allele at a single gene locus and is expressed only in homozygotes. All F1 seedlings obtained by crossing the male-sterile mother tree and 62 out of the 63 clones produced pollen. In contrast, F1 seedlings obtained from the crossing between the male-sterile mother tree and a plus tree clone, Ohara 13, produced 64 male-sterile individuals and 52 fertile individuals. The segregation ratio fitted the expected 1 : 1 ratio according to a chi-square test. These results clearly demonstrate that the Ohara 13 clone is heterozygous for a male-sterility gene.

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