Mapping of QTLs associated with cadmium tolerance and accumulation during seedling stage in rice (<Emphasis Type="Italic">Oryza sativa</Emphasis> L.) |
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| Authors: | Dawei Xue Mingcan Chen Guoping Zhang |
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| Institution: | (1) Agronomy Department, Zhejiang University, 310029 Hangzhou, China;(2) College of Agronomy, Henan University of Science and Technology, 471003 Luoyang, China |
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| Abstract: | Cadmium (Cd) is a non-essential element and toxic to plants. To investigate the genetics of Cd tolerance and accumulation
in rice, quantitative trait loci (QTL) associated with Cd tolerance and accumulation at the seedling stage were mapped using
a doubled haploid (DH) population derived from a cross between a japonica JX17 and an indica ZYQ8. A total of 22 QTLs were found to be associated with shoot height (SH), root length (RL), shoot dry weight (SDW), root
dry weight (RDW), total dry weight (TDW) and chlorophyll content (CC), and 10 and 12 QTLs were identified under the control
and Cd stress conditions, respectively. For Cd tolerant coefficient (CTC), 6 QTLs were detected on chromosomes 1, 3, 5, 8
and 10. Under Cd stress, 3 QTLs controlling root and shoot Cd concentrations were mapped on chromosome 6 and 7. One QTL for
shoot/root rate of Cd concentration was identified on chromosome 3. The results indicated that Cd tolerance and accumulation
were quantitatively inherited, and the detected QTLs may be useful for marker-assistant selection (MAS) and identification
of the genes controlling Cd tolerance and accumulation in rice. |
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| Keywords: | Rice QTL Cadmium Tolerance Accumulation |
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