Genetic diversity of soft spring wheat in resistance to early drought
Soft spring wheat has a wide range of genetic diversity in water deficiency response at juvenile stage of plant development. Fifty-nine collection samples were studied under laboratory conditions. In control variant distilled water was used, in experiment - sucrose solution (9 atm). The relative ind...
| Main Authors: | , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | Russian |
| Published: |
FARC North-East
2018
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| Subjects: | |
| Online Access: | https://www.agronauka-sv.ru/jour/article/view/188 https://doi.org/10.30766/2072-9081.2018.62.1.32-37 |
| Summary: | Soft spring wheat has a wide range of genetic diversity in water deficiency response at juvenile stage of plant development. Fifty-nine collection samples were studied under laboratory conditions. In control variant distilled water was used, in experiment - sucrose solution (9 atm). The relative index of seed roots number is the most information-bearing criterion for estimation of potential drought-resistance level. Based on this criterion 16.9% samples of the studied set are estimated as highly resistant, 50.8% - as resistant ones. Low level of resistance is characteristic for only 5.1% of studied genotypes. The following species were recognized as having high drought-resistance level: ANK-4 (Novosibirsk region, Russia), Vetluzhanka (Krasnoyarsk territory, Russia), Vishivanka (Ukraine), E-737 (Kazakhstan), Cahuide (Peru), Klein Vencedor (Argentina), Musket (Great Britain), NOS Norko (Germany), Ta 3332 (Finland). Cluster analysis divided the whole set of variety samples into 5 groups having different combinations of such parameters as seed germination ability, number of seed roots, the intensity of root development and germ growth both under control and in conditions of physiological drought. To raise the level of potential drought resistance it is possible to use genotypes from remote clusters for crossing. Мягкая яровая пшеница имеет широкий спектр генотипического разнообразия по реакции на водный дефицит в ювенильную фазу развития. В лабораторных условиях исследованы 59 коллекционных образцов. В контрольном варианте использована дистиллированная вода, в опыте - раствор сахарозы (9 атм.). Наиболее информативным критерием определения уровня потенциальной засухоустойчивости является относительный показатель числа зародышевых корней. По данному критерию 16,9% образцов из исследованного набора оценены как высокоустойчивые, еще 50,8% - устойчивые к ранней засухе. Слабая устойчивость характерна только для 5,1% генотипов. Высоким уровнем интегральной засухоустойчивости обладают образцы АНК-4 (Россия, Новосибирская ... |
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