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Reference Detail
| Reference | ||
|---|---|---|
| Author | Xu Z., Chen Z., Wang R., Miao Y., Gao H., Tang S., Zhang H., Liu Q. | |
| Title | Characterization and fine-mapping of qHd2-1, a minor quantitative locus that affects heading date under long-day conditions in rice (Oryza sativa L.) | |
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Abstract: heading date, a complex quantitative trait, determines regional adaptability and is associated with grain yield and quality in rice. In this study, we characterized qHd2-1, a minor-effect quantitative locus (QTL) for promoting heading date (by 3–4 days) under long-day (LD) conditions, but not short-day (SD) conditions. The qHd2-1 locus was detected in single segment substitution line (SSSL) N22-1, which was developed using indica 9311 as the donor and japonica Nipponbare (NP) as the recipient. A set of substitution lines were developed from a segregating population derived from a cross between N22-1 and NP. Based on the genotypic identification and phenotypic evaluation of the target substitution lines, qHd2-1 was narrowed down to a 105-kb region between STS2-20 and STS2-22 on the short arm of chromosome 2. Furthermore, qHd2-1 was found to function by upregulating the florigen genes Hd3a and RFT1 during floral induction under LD conditions. Field tests showed that qHd2-1 promotion of heading date affects grain yield‑related agronomic traits, such as plant height, panicle number per plant, and flag leaf size, as well as thousand-grain weight and grain width. Taken together, these findings establish a foundation for cloning this minor-effect QTL involved in heading date, and qHd2-1 could be of great significance in rice breeding to allow the fine-tuning of heading date in rice cultivars. |
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| Journal | Molecular Breeding | |
| Country | China | |
| Volume | 40(27) | |
| Pages | ||
| Year | 2020 | |
| PubMed ID | - | |
| PubMed Central ID | - | |
| DOI | 10.1007/s11032-020-1107-z | |
| URL | - | |
| Relation | ||
| Gene | HD3A MADS60 RFT1 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
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Stages in Each Organ - Muant Lines (Gene) |
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| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
