Mobilization of a transposon in the rice genome

Tetsuya Nakazaki, Yutaka Okumoto, Akira Horibata, Satoshi Yamahira, Masayoshi Teraishi, Hidetaka Nishida, Hiromo Inoue and Takatoshi Tanisaka ()
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Tetsuya Nakazaki: Kyoto University
Yutaka Okumoto: Kyoto University
Akira Horibata: Kinki University
Satoshi Yamahira: Kyoto University
Masayoshi Teraishi: Kyoto University
Hidetaka Nishida: Kyoto University
Hiromo Inoue: Kyoto University
Takatoshi Tanisaka: Kyoto University

Nature, 2003, vol. 421, issue 6919, 170-172

Abstract: Abstract Rice (Oryza sativa L.) is an important crop worldwide and, with the availability of the draft sequence1,2, a useful model for analysing the genome structure of grasses3,4. To practice efficient rice breeding through genetic engineering techniques, it is important to identify the economically important genes in this crop. The use of mobile transposons as gene tags in intact plants is a powerful tool for functional analysis because transposon insertions often inactivate genes5. Here we identify an active rice transposon named miniature Ping (mPing) through analysis of the mutability of a slender mutation of the glume6—the seed structure that encloses and determines the shape of the grain. The mPing transposon is inserted in the slender glume (slg) mutant allele but not in the wild-type allele. Search of the O. sativa variety Nipponbare genome identified 34 sequences with high nucleotide similarity to mPing, indicating that mPing constitutes a family of transposon elements. Excision of mPing from slg plants results in reversion to a wild-type phenotype. The mobility of the transposon mPing in intact rice plants represents a useful alternative tool for the functional analysis of rice genes.

Date: 2003
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DOI: 10.1038/nature01219

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