Assessing the Heat Tolerance of Meiosis in Spanish Landraces of Tetraploid Wheat <i>Triticum turgidum</i>
Heat stress alters the number and distribution of meiotic crossovers in wild and cultivated plant species. Hence, global warming may have a negative impact on meiosis, fertility, and crop productions. Assessment of germplasm collections to identify heat-tolerant genotypes is a priority for future cr...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/11/13/1661 |
| _version_ | 1797442272644562944 |
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| author | Tomás Naranjo Nieves Cuñado Juan Luis Santos |
| author_facet | Tomás Naranjo Nieves Cuñado Juan Luis Santos |
| author_sort | Tomás Naranjo |
| collection | DOAJ |
| description | Heat stress alters the number and distribution of meiotic crossovers in wild and cultivated plant species. Hence, global warming may have a negative impact on meiosis, fertility, and crop productions. Assessment of germplasm collections to identify heat-tolerant genotypes is a priority for future crop improvement. Durum wheat, <i>Triticum turgidum</i>, is an important cultivated cereal worldwide and given the genetic diversity of the durum wheat Spanish landraces core collection, we decided to analyse the heat stress effect on chiasma formation in a sample of 16 landraces of <i>T. turgidum</i> ssp. <i>turgidum</i> and T. <i>turgidum</i> ssp. <i>durum</i>, from localities with variable climate conditions. Plants of each landrace were grown at 18–22 °C and at 30 °C during the premeiotic temperature-sensitive stage. The number of chiasmata was not affected by heat stress in three genotypes, but decreased by 0.3–2 chiasmata in ten genotypes and more than two chiasmata in the remaining three ones. Both thermotolerant and temperature-sensitive genotypes were found in the two subspecies, and in some of the agroecological zones studied, which supports that genotypes conferring a heat tolerant meiotic phenotype are not dependent on subspecies or geographical origin. Implications of heat adaptive genotypes in future research and breeding are discussed. |
| first_indexed | 2024-03-09T12:39:26Z |
| format | Article |
| id | doaj.art-001e0490f2344f53b2e4a3a4070cea32 |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-09T12:39:26Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-001e0490f2344f53b2e4a3a4070cea322023-11-30T22:19:04ZengMDPI AGPlants2223-77472022-06-011113166110.3390/plants11131661Assessing the Heat Tolerance of Meiosis in Spanish Landraces of Tetraploid Wheat <i>Triticum turgidum</i>Tomás Naranjo0Nieves Cuñado1Juan Luis Santos2Departamento de Genética, Fisiología y Microbiología, Facultad de Biología, Universidad Complutense de Madrid, 28040 Madrid, SpainDepartamento de Genética, Fisiología y Microbiología, Facultad de Biología, Universidad Complutense de Madrid, 28040 Madrid, SpainDepartamento de Genética, Fisiología y Microbiología, Facultad de Biología, Universidad Complutense de Madrid, 28040 Madrid, SpainHeat stress alters the number and distribution of meiotic crossovers in wild and cultivated plant species. Hence, global warming may have a negative impact on meiosis, fertility, and crop productions. Assessment of germplasm collections to identify heat-tolerant genotypes is a priority for future crop improvement. Durum wheat, <i>Triticum turgidum</i>, is an important cultivated cereal worldwide and given the genetic diversity of the durum wheat Spanish landraces core collection, we decided to analyse the heat stress effect on chiasma formation in a sample of 16 landraces of <i>T. turgidum</i> ssp. <i>turgidum</i> and T. <i>turgidum</i> ssp. <i>durum</i>, from localities with variable climate conditions. Plants of each landrace were grown at 18–22 °C and at 30 °C during the premeiotic temperature-sensitive stage. The number of chiasmata was not affected by heat stress in three genotypes, but decreased by 0.3–2 chiasmata in ten genotypes and more than two chiasmata in the remaining three ones. Both thermotolerant and temperature-sensitive genotypes were found in the two subspecies, and in some of the agroecological zones studied, which supports that genotypes conferring a heat tolerant meiotic phenotype are not dependent on subspecies or geographical origin. Implications of heat adaptive genotypes in future research and breeding are discussed.https://www.mdpi.com/2223-7747/11/13/1661heat stresschiasmatadurum wheatgenetic diversity |
| spellingShingle | Tomás Naranjo Nieves Cuñado Juan Luis Santos Assessing the Heat Tolerance of Meiosis in Spanish Landraces of Tetraploid Wheat <i>Triticum turgidum</i> Plants heat stress chiasmata durum wheat genetic diversity |
| title | Assessing the Heat Tolerance of Meiosis in Spanish Landraces of Tetraploid Wheat <i>Triticum turgidum</i> |
| title_full | Assessing the Heat Tolerance of Meiosis in Spanish Landraces of Tetraploid Wheat <i>Triticum turgidum</i> |
| title_fullStr | Assessing the Heat Tolerance of Meiosis in Spanish Landraces of Tetraploid Wheat <i>Triticum turgidum</i> |
| title_full_unstemmed | Assessing the Heat Tolerance of Meiosis in Spanish Landraces of Tetraploid Wheat <i>Triticum turgidum</i> |
| title_short | Assessing the Heat Tolerance of Meiosis in Spanish Landraces of Tetraploid Wheat <i>Triticum turgidum</i> |
| title_sort | assessing the heat tolerance of meiosis in spanish landraces of tetraploid wheat i triticum turgidum i |
| topic | heat stress chiasmata durum wheat genetic diversity |
| url | https://www.mdpi.com/2223-7747/11/13/1661 |
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