Please use this identifier to cite or link to this item:
http://dx.doi.org/10.25673/110396
Title: | Dissection of a grain yield QTL from wild emmer wheat reveals sub-intervals associated with culm length and kernel number |
Author(s): | Deblieck, Mathieu![]() Szilagyi, Gergely Andrii, Fatiukha Saranga, Yehoshua Lauterberg, Madita Neumann, Kerstin Krugman, Tamar Perovic, Dragan ![]() Pillen, Klaus ![]() Ordon, Frank ![]() |
Issue Date: | 2022 |
Type: | Article |
Language: | English |
Abstract: | Genetic diversity in wheat has been depleted due to domestication and modern breeding. Wild relatives are a valuable source for improving drought tolerance in domesticated wheat. A QTL region on chromosome 2BS of wild emmer wheat (Triticum turgidum ssp. dicoccoides), conferring high grain yield under well-watered and water-limited conditions, was transferred to the elite durum wheat cultivar Uzan (T. turgidum ssp. durum) by a marker-assisted backcross breeding approach. The 2B introgression line turned out to be higher yielding but also exhibited negative traits that likely result from trans-, cis-, or linkage drag effects from the wild emmer parent. In this study, the respective 2BS QTL was subjected to fine-mapping, and a set of 17 homozygote recombinants were phenotyped at BC4F5 generation under water-limited and well-watered conditions at an experimental farm in Israel and at a high-throughput phenotyping platform (LemnaTec-129) in Germany. In general, both experimental setups allowed the identification of sub-QTL intervals related to culm length, kernel number, thousand kernel weight, and harvest index. Sub-QTLs for kernel number and harvest index were detected specifically under either drought stress or well-watered conditions, while QTLs for culm length and thousand-kernel weight were detected in both conditions. Although no direct QTL for grain yield was identified, plants with the sub-QTL for kernel number showed a higher grain yield than the recurrent durum cultivar Uzan under well-watered and mild drought stress conditions. We, therefore, suggest that this sub-QTL might be of interest for future breeding purposes. |
URI: | https://opendata.uni-halle.de//handle/1981185920/112351 http://dx.doi.org/10.25673/110396 |
Open Access: | ![]() |
License: | ![]() |
Journal Title: | Frontiers in genetics |
Publisher: | Frontiers Media |
Publisher Place: | Lausanne |
Volume: | 13 |
Original Publication: | 10.3389/fgene.2022.955295 |
Appears in Collections: | Open Access Publikationen der MLU |
Files in This Item:
File | Description | Size | Format | |
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fgene-13-955295.pdf | 3.74 MB | Adobe PDF | ![]() View/Open |