A major quantitative trait locus for increasing cadmium-specific concentration in rice grain is located on the short arm of chromosome 7

A major quantitative trait locus for increasing cadmium-specific concentration in rice grain is located on the short arm of chromosome 7

Large phenotypic variations in the cadmium (Cd) concentration of rice grains and shoots have been observed. However, the genetic control of Cd accumulation remains poorly understood. Quantitative trait loci (QTLs) determining the grain Cd concentration of rice grown in a Cd-polluted paddy field were...

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Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 61(2010), 3 vom: 18. März, Seite 923-34
1. Verfasser: Ishikawa, Satoru (VerfasserIn)
Weitere Verfasser: Abe, Tadashi, Kuramata, Masato, Yamaguchi, Masayuki, Ando, Tsuyu, Yamamoto, Toshio, Yano, Masahiro
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2010
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Trace Elements Cadmium 00BH33GNGH
Beschreibung
Zusammenfassung:Large phenotypic variations in the cadmium (Cd) concentration of rice grains and shoots have been observed. However, the genetic control of Cd accumulation remains poorly understood. Quantitative trait loci (QTLs) determining the grain Cd concentration of rice grown in a Cd-polluted paddy field were identified. Using a mapping population consisting of 85 backcross inbred lines derived from a cross between the low-Cd-accumulating cultivar Sasanishiki (japonica) and high-Cd-accumulating cultivar Habataki (indica), two QTLs for increasing grain Cd concentration were found on chromosomes 2 and 7. A major-effect QTL, qGCd7 (QTL for grain Cd on chromosome 7), was detected on the short arm of chromosome 7. It accounted for 35.5% of all phenotypic variance in backcross inbred lines. qGCd7 was not genetically related to any QTLs for concentrations of essential trace metals (Cu, Fe, Mn, and Zn) or those for agronomic traits such as heading date, suggesting that this QTL is specific to Cd. Furthermore, the existence of qGCd7 was confirmed using chromosome segment substitution lines (CSSLs) and an F(2) population from a cross between the target CSSL and Sasanishiki grown in a Cd-polluted paddy soil. To our knowledge, qGCd7 is a novel QTL with major effects for increasing grain Cd concentrations
Beschreibung:Date Completed 22.04.2010
Date Revised 20.10.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1460-2431
DOI:10.1093/jxb/erp360