Genetical Studies on Germination of Seed and Seedling Establishment for Breeding of Improved Rice Varieties Suitable for Direct Seeding Culture

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
38-01-01.pdf148.41 KB

For the introduction of low temperature germinability (LTG), seed longevity and accelerated coleoptile growth derived from foreign varieties to Japanese elite varieties to breed rice varieties for direct seeding culture in Japan, we tried to establish backcross breeding to introduce these traits with marker-assisted selection (MAS). The objectives of this study were to identify quantitative trait loci (QTLs) for LTG and seed longevity using backcross inbred lines derived from a cross between a japonica variety Nipponbare and an indica variety Kasalath in order to facilitate MAS of these traits. Five putative QTLs controlling LTG were detected on chromosomes 2, 4 and 11. A putative QTL with a large seed longevity effect was detected on chromosome 9. We bred a near isogenic line for coleoptile growth by a backcross between Kitaibuki as the recurrent parent and Arroz da Terra as the donor parent to have more rapid coleoptile growth and higher seedling establishment rate than Kitaibuki. From the above experimental data, we conclude that backcross breeding with MAS is effective to introduce genes for adaptability to direct seeding from foreign varieties in Japanese rice breeding programs.

作成者 MIURA Kiyoyuki Yang LIN Shao ARAKI Hitoshi NAGAMINE Tsukasa KUROKI Makoto SHIMIZU Hiroyuki ANDO Ikuo YANO Masahiro

Oryza sativa L.

quantitative trait loci

marker-assisted selection

公開者 Japan International Research Center for Agricultural Sciences
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
開始ページ 1
終了ページ 5
DOI 10.6090/jarq.38.1
権利 Japan International Research Center for Agricultural Sciences
言語 eng