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Semidwarf Gene d60 Affected by Ubiquitous Gamete Lethal Gene gal Produced Rare Double Dwarf with d30 via Recombination Breaking Repulsion-Phase Linkage on Rice Chromosome 2

1
Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
2
Faculty of Agriculture, Tottori University, 4-101 Koyama Minami, Tottori 680-8550, Japan
*
Author to whom correspondence should be addressed.
Genes 2019, 10(11), 874; https://doi.org/10.3390/genes10110874
Received: 22 August 2019 / Revised: 17 October 2019 / Accepted: 18 October 2019 / Published: 31 October 2019
(This article belongs to the Section Plant Genetics and Genomics)
The genotype of gal and d60 were investigated in 33 rice varieties chosen from representative semidwarf and dwarf rice varieties. These were crossed with three tester lines, the d60Gal line (genotype d60d60GalGal), the D60gal line (Koshihikari, D60D60galgal), and the D60Gal line (D60D60GalGal). Each F1 plant was measured for culm length, and seed fertility. As a result, all F1 lines with the d60Gal line showed tallness and partial sterility, reduced by 25% in average from those with the D60gal line (Koshihikari) and the D60Gal line. These data indicated that the genotype of the 33 varieties is D60D60galgal and that the d60 locus is not allelic to those of sd1, d1, d2, d6, d18k, d29, d30, d35, d49, d50, and qCL1 involved in the 33 varieties. In addition, the gal gene is not complementarily activated with the semidwarf and dwarf genes described above, other than d60. The Gal gene will be ubiquitously distributed in rice. It is emphasized that Gal is a rare and valuable mutant gene essential to the transmission of d60. The double dwarf genotype of homozygous d30d60 was rarely gained in the F3 of the d30 line × d60 line by breaking their repulsion d60-D30 linkage on chromosome 2. View Full-Text
Keywords: rice; semidwarf gene; gamete lethal; non-Mendelian ratio; linkage; chromosome 2 rice; semidwarf gene; gamete lethal; non-Mendelian ratio; linkage; chromosome 2
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Tomita, M.; Tanaka, J. Semidwarf Gene d60 Affected by Ubiquitous Gamete Lethal Gene gal Produced Rare Double Dwarf with d30 via Recombination Breaking Repulsion-Phase Linkage on Rice Chromosome 2. Genes 2019, 10, 874.

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