High-resolution genetic mapping and candidate gene identification of the <Emphasis Type="Italic">SLP1</Emphasis> locus that controls glume development in rice |
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Authors: | Sheng-Shan Wang Chang-Sheng Wang Tung-Hai Tseng Ya-Lin Hou Kai-Yi Chen |
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Institution: | (1) Department of Agronomy, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan;(2) Division of Crop Improvement, Tainan District Agricultural Research and Extension Station, Tainan, 71246, Taiwan;(3) Department of Agronomy, National Chung-Hsing University, Taichung, 40227, Taiwan;(4) Crop Science Division, Agricultural Research Institute, Taichung, 41301, Taiwan; |
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Abstract: | Stunted lemma palea 1 (slp1) is a rice mutant that displays dwarfism, shortened inflorescence lengths, severely degenerated lemmas/paleas, and sterility.
The SLP1 locus was mapped between markers RM447 and D275 in the distal region of the long arm of chromosome 8, using the F2 progeny
derived from the cross between the Slp1/slp1 mutant (Oryza sativa subsp. japonica) and the variety Taichung Native 1 (TN1, O. sativa subsp. indica). The SLP1 locus was further delimited to a 46.4-kb genomic region containing three putative genes: OsSPL16, OsMADS45, and OsMADS37. Comparisons of the sequence variations and expression levels of the three candidate genes between wild-type plants and homozygous
slp1 mutants suggested that a missense mutation in the sixth amino acid of the OsSPL16 protein was likely responsible for the
slp1 mutant phenotypes. |
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