QTLs identification of crude fat content in brown rice and its genetic basis analysis using DH and two backcross populations |
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Authors: | Wenjun Liu Jing Zeng Gonghao Jiang Yuqing He |
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Institution: | (1) National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research (Wuhan) and National Center of Crop Molecular Breeding, Huazhong Agricultural University, 430070 Wuhan, China |
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Abstract: | Fat content is a concern for the enhancement of rice for eating, cooking, and storage qualities. To clarify its genetic mechanism,
a double haploid (DH) population derived from anther hybrid F1 of Zhenshan 97B (indica) and Wuyujing 2 (japonica) and two backcross F1 (BCF1) populations, which came from the DH lines backcrossing to two parents, were used to scan quantitative trait loci (QTLs)
and dissect gene effects for the crude fat content (CFC) in brown rice. Fourteen QTLs were resolved, distributing on chromosomes
1, 3, and 5–9. Three loci were detected repeatedly in two populations, DH or BCF1. Among these loci, a major QTL, qCFC5, flanking markers RM87 and RM334, was located on chromosome 5, which was detected simultaneously among three populations.
The main QTLs had a major role in controlling CFC in brown rice and were modified by several mini-effect QTLs and epistatic
affection.
Wenjun Liu and Jing Zeng are contributed equally to this paper. |
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Keywords: | Crude fat content Double hybrid lines Backcross populations Quantitative trait loci (QTL) Epistasis Oryza sativa L |
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