QTL Analysis and Heterosis Loci of Effective Tiller Using Three Genetic Populations Derived from <i>Indica</i>-<i>Japonica</i> Crosses in Rice
Effective panicle numbers (PNs) and Tiller numbers (TNs) are important traits affecting rice (<i>Oryza sativa</i> L.) architecture and grain yield. However, the molecular mechanisms underlying PN and TN heterosis remain unknown in rice. In addition, new PN- or TN-related genes need to be...
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MDPI AG
2022-09-01
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| author | Xiaoxiao Deng Jingzhang Wang Xuhui Liu Jian Yang Mingao Zhou Weilong Kong Yifei Jiang Shiming Ke Tong Sun Yangsheng Li |
| author_facet | Xiaoxiao Deng Jingzhang Wang Xuhui Liu Jian Yang Mingao Zhou Weilong Kong Yifei Jiang Shiming Ke Tong Sun Yangsheng Li |
| author_sort | Xiaoxiao Deng |
| collection | DOAJ |
| description | Effective panicle numbers (PNs) and Tiller numbers (TNs) are important traits affecting rice (<i>Oryza sativa</i> L.) architecture and grain yield. However, the molecular mechanisms underlying PN and TN heterosis remain unknown in rice. In addition, new PN- or TN-related genes need to be detected and discovered. In this study, in order to detect rice quantitative trait loci (QTLs) and the heterosis-related loci of PN or TN in rice, we developed a high generation recombinant inbred line (RIL) population from a cross of two elite cultivars, Luohui9 (<i>Xian/Indica</i>) and RPY geng (<i>Geng/Japonica</i>), and two testcross hybrid populations derived from the crosses of RILs and two cytoplasmic male sterile lines, YTA (<i>Xian/Indica</i>) and Z7A (<i>Geng/Japonica</i>). Finally, nine QTLs of PN across four seasons were identified, and two QTLs of TN in 191HB were mapped. Besides this, six heterosis-related QTLs of PN and five heterosis-related QTLs of TN were located. We found that heterosis-related QTLs of PN or TN covered multiple known genes, such as <i>MOC1</i>, <i>TAC1</i> and <i>OsETR2</i>. Furthermore, homologous gene analysis identified one candidate gene of PN (<i>LOC_10g25720</i>). Together, these findings uncover multiple heterosis-related loci, and provide a new insight into the heterosis mechanism of PN and TN in rice. |
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| last_indexed | 2024-03-10T00:58:38Z |
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| spelling | doaj.art-58acdd8a22914191a01de5404a28f1482023-11-23T14:38:32ZengMDPI AGAgronomy2073-43952022-09-01129217110.3390/agronomy12092171QTL Analysis and Heterosis Loci of Effective Tiller Using Three Genetic Populations Derived from <i>Indica</i>-<i>Japonica</i> Crosses in RiceXiaoxiao Deng0Jingzhang Wang1Xuhui Liu2Jian Yang3Mingao Zhou4Weilong Kong5Yifei Jiang6Shiming Ke7Tong Sun8Yangsheng Li9State Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice, Ministry of Agriculture, College of Life Sciences, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice, Ministry of Agriculture, College of Life Sciences, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice, Ministry of Agriculture, College of Life Sciences, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice, Ministry of Agriculture, College of Life Sciences, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice, Ministry of Agriculture, College of Life Sciences, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice, Ministry of Agriculture, College of Life Sciences, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice, Ministry of Agriculture, College of Life Sciences, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice, Ministry of Agriculture, College of Life Sciences, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice, Ministry of Agriculture, College of Life Sciences, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice, Ministry of Agriculture, College of Life Sciences, Wuhan University, Wuhan 430072, ChinaEffective panicle numbers (PNs) and Tiller numbers (TNs) are important traits affecting rice (<i>Oryza sativa</i> L.) architecture and grain yield. However, the molecular mechanisms underlying PN and TN heterosis remain unknown in rice. In addition, new PN- or TN-related genes need to be detected and discovered. In this study, in order to detect rice quantitative trait loci (QTLs) and the heterosis-related loci of PN or TN in rice, we developed a high generation recombinant inbred line (RIL) population from a cross of two elite cultivars, Luohui9 (<i>Xian/Indica</i>) and RPY geng (<i>Geng/Japonica</i>), and two testcross hybrid populations derived from the crosses of RILs and two cytoplasmic male sterile lines, YTA (<i>Xian/Indica</i>) and Z7A (<i>Geng/Japonica</i>). Finally, nine QTLs of PN across four seasons were identified, and two QTLs of TN in 191HB were mapped. Besides this, six heterosis-related QTLs of PN and five heterosis-related QTLs of TN were located. We found that heterosis-related QTLs of PN or TN covered multiple known genes, such as <i>MOC1</i>, <i>TAC1</i> and <i>OsETR2</i>. Furthermore, homologous gene analysis identified one candidate gene of PN (<i>LOC_10g25720</i>). Together, these findings uncover multiple heterosis-related loci, and provide a new insight into the heterosis mechanism of PN and TN in rice.https://www.mdpi.com/2073-4395/12/9/2171riceeffective panicle numberstiller numbersQTL analysisheterosis-related loci |
| spellingShingle | Xiaoxiao Deng Jingzhang Wang Xuhui Liu Jian Yang Mingao Zhou Weilong Kong Yifei Jiang Shiming Ke Tong Sun Yangsheng Li QTL Analysis and Heterosis Loci of Effective Tiller Using Three Genetic Populations Derived from <i>Indica</i>-<i>Japonica</i> Crosses in Rice Agronomy rice effective panicle numbers tiller numbers QTL analysis heterosis-related loci |
| title | QTL Analysis and Heterosis Loci of Effective Tiller Using Three Genetic Populations Derived from <i>Indica</i>-<i>Japonica</i> Crosses in Rice |
| title_full | QTL Analysis and Heterosis Loci of Effective Tiller Using Three Genetic Populations Derived from <i>Indica</i>-<i>Japonica</i> Crosses in Rice |
| title_fullStr | QTL Analysis and Heterosis Loci of Effective Tiller Using Three Genetic Populations Derived from <i>Indica</i>-<i>Japonica</i> Crosses in Rice |
| title_full_unstemmed | QTL Analysis and Heterosis Loci of Effective Tiller Using Three Genetic Populations Derived from <i>Indica</i>-<i>Japonica</i> Crosses in Rice |
| title_short | QTL Analysis and Heterosis Loci of Effective Tiller Using Three Genetic Populations Derived from <i>Indica</i>-<i>Japonica</i> Crosses in Rice |
| title_sort | qtl analysis and heterosis loci of effective tiller using three genetic populations derived from i indica i i japonica i crosses in rice |
| topic | rice effective panicle numbers tiller numbers QTL analysis heterosis-related loci |
| url | https://www.mdpi.com/2073-4395/12/9/2171 |
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