Identification and Validation of a Novel Major QTL Controlling Leaf Pubescence in the Chinese Wheat Landrace ‘Baimaomai’
Leaf pubescence is an important trait closely associated with plant adaptability to specialized habitats. Baimaomai (BMM) is a wheat (<i>Triticum aestivum</i> L.) landrace originating from the high-altitude, drought-prone environment of Sichuan Province, China with long, dense leaf pubes...
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| Autores principales: | , , , , , , , , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/748a4fd33a634f1bbfec05ec00e91ff7 |
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| Sumario: | Leaf pubescence is an important trait closely associated with plant adaptability to specialized habitats. Baimaomai (BMM) is a wheat (<i>Triticum aestivum</i> L.) landrace originating from the high-altitude, drought-prone environment of Sichuan Province, China with long, dense leaf pubescence. A population of 234 recombinant inbred lines (F<sub>10</sub>) developed from the cross between Chuanmai104 (CM104), which lacks leaf pubescence, and BMM with pubescent leaves, was used to conduct a phenotypic evaluation of leaf pubescence. Three quantitative trait loci (QTLs) were detected on chromosome arms 7BS, 3DL and 3AL using a high-density wheat 50K single-nucleotide polymorphism array in four environments. The QTLs were designated <i>QLp.saas-7BS</i>, <i>QLp.saas-3DL</i> and <i>QLp.saas-3AL</i>. <i>QLp.saas-3AL</i>, derived from BMM, and <i>QLp.saas-3DL</i>, derived from CM104, were new minor-effect loci. <i>QLp.saas-7BS</i>, derived from BMM, was a novel major-effect locus detected in all environments and was localized in a 0.48 Mb interval on chromosome arm 7BS based on the wheat ‘Chinese Spring’ reference genome. <i>QLp.saas-7BS</i> explained up to 40.77% of the total phenotypic variance. KASP markers tightly linked to <i>QLp.saas-7BS</i> were developed and verified. The present results provide valuable information for further fine mapping, cloning, and marker-assisted selection with <i>QLp.saas-7BS</i> in wheat. |
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