Reference "Comparative mapping of QTLs for Al tolerance in rice and identification of positional Al-induced genes"

Reference ID

8301

Title

Comparative mapping of QTLs for Al tolerance in rice and identification of positional Al-induced genes

Source

J Zhejiang Univ Sci, 2004, vol. 5, pp. 634-643

Authors (7)

Mao-C-Z	Yang-L
Zheng-B-S	Wu-Y-R
Liu-F-Y	Yi-K-K
Wu-P

Abstract

Aluminum (Al) toxicity is the major factor limiting crop productivity in acid
soils. In this study, a recombinant inbreed line (RIL) population derived from
a cross between an Al sensitive lowland indica rice variety IR1552 and an Al
tolerant upland japonica rice variety Azucena, was used for mapping
quantitative trait loci (QTLs) for Al tolerance. Three QTLs for relative root
length (RRL) were detected on chromosome 1, 9, 12, respectively, and 1 QTL for
root length under Al stress is identical on chromosome 1 after one week and two
weeks stress. Comparison of QTLs on chromosome 1 from different studies
indicated an identical interval between C86 and RZ801 with gene(s) for Al
tolerance. This interval provides an important start point for isolating genes
responsible for Al tolerance and understanding the genetic nature of Al
tolerance in rice. Four Al induced ESTs located in this interval were screened
by reverse Northern analysis and confirmed by Northern analysis. They would be
candidate genes for the QTL.