Dissection of drought response of modern and underutilized wheat varieties according to Passioura’s yield-water framework
Trait-based breeding is essential to improve wheat yield, particularly when stress adaptation is targeted. A set of modern and underutilized wheat genotypes was examined in a two-year field experiment with distinct seasonal water supply. Yield formation and drought response strategies were analyzed...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2015-07-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fpls.2015.00570/full |
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| author | ALIREZA eNAKHFOROOSH Heinrich eGRAUSGRUBER Hans-Peter eKaul Gernot eBodner |
| author_facet | ALIREZA eNAKHFOROOSH Heinrich eGRAUSGRUBER Hans-Peter eKaul Gernot eBodner |
| author_sort | ALIREZA eNAKHFOROOSH |
| collection | DOAJ |
| description | Trait-based breeding is essential to improve wheat yield, particularly when stress adaptation is targeted. A set of modern and underutilized wheat genotypes was examined in a two-year field experiment with distinct seasonal water supply. Yield formation and drought response strategies were analyzed in relation to components of Passioura’s yield-water framework based on phenological, morphological, physiological and root characteristics. Limited water supply resulted in 60% yield loss and substantially lower water use (37%), water use efficiency (32.6%) and harvest index (14%). Phenology and root length density were key determinants of water use. Late flowering underutilized wheat species with large root system and swift ground coverage showed greatest water use. Leaf chlorophyll concentration and stomata conductance were higher in modern cultivars, supporting their high biomass growth and superior water use efficiency. While, lower chlorophyll concentration and stomata conductance of underutilized wheats indicated a water saving strategy with an intrinsic limitation of potential growth. Harvest index was strongly dependent on phenology and yield components. Optimized flowering time, reduced tillering and strong grain sink of modern cultivars explained higher harvest index compared to underutilized wheats. Cluster analysis revealed the consistent differentiation of underutilized and modern wheats based on traits underlying Passioura’s yield-water framework. We identified physiological and root traits within modern cultivars to be targeted for trait-based crop improvement under water-limited conditions. High capacity of water use in underutilized genetic resources is related to yield-limiting phenological and morphological traits, constraining their potential role for better drought resistance. Still some genetic resources provide adaptive features for stress resistance compatible with high yield as revealed by high harvest index under drought of Khorasan wheat. |
| first_indexed | 2024-12-19T03:19:53Z |
| format | Article |
| id | doaj.art-c3a5b725da094f4d8b844951ec78a3ee |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-19T03:19:53Z |
| publishDate | 2015-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-c3a5b725da094f4d8b844951ec78a3ee2022-12-21T20:37:48ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2015-07-01610.3389/fpls.2015.00570151836Dissection of drought response of modern and underutilized wheat varieties according to Passioura’s yield-water frameworkALIREZA eNAKHFOROOSH0Heinrich eGRAUSGRUBER1Hans-Peter eKaul2Gernot eBodner3University of Natural Resources and Life Sciences, ViennaUniversity of Natural Resources and Life Sciences, ViennaUniversity of Natural Resources and Life Sciences, ViennaUniversity of Natural Resources and Life Sciences, ViennaTrait-based breeding is essential to improve wheat yield, particularly when stress adaptation is targeted. A set of modern and underutilized wheat genotypes was examined in a two-year field experiment with distinct seasonal water supply. Yield formation and drought response strategies were analyzed in relation to components of Passioura’s yield-water framework based on phenological, morphological, physiological and root characteristics. Limited water supply resulted in 60% yield loss and substantially lower water use (37%), water use efficiency (32.6%) and harvest index (14%). Phenology and root length density were key determinants of water use. Late flowering underutilized wheat species with large root system and swift ground coverage showed greatest water use. Leaf chlorophyll concentration and stomata conductance were higher in modern cultivars, supporting their high biomass growth and superior water use efficiency. While, lower chlorophyll concentration and stomata conductance of underutilized wheats indicated a water saving strategy with an intrinsic limitation of potential growth. Harvest index was strongly dependent on phenology and yield components. Optimized flowering time, reduced tillering and strong grain sink of modern cultivars explained higher harvest index compared to underutilized wheats. Cluster analysis revealed the consistent differentiation of underutilized and modern wheats based on traits underlying Passioura’s yield-water framework. We identified physiological and root traits within modern cultivars to be targeted for trait-based crop improvement under water-limited conditions. High capacity of water use in underutilized genetic resources is related to yield-limiting phenological and morphological traits, constraining their potential role for better drought resistance. Still some genetic resources provide adaptive features for stress resistance compatible with high yield as revealed by high harvest index under drought of Khorasan wheat.http://journal.frontiersin.org/Journal/10.3389/fpls.2015.00570/fulldrought resistancePhenologyStomatal conductanceWater use efficiencyGenetic resources |
| spellingShingle | ALIREZA eNAKHFOROOSH Heinrich eGRAUSGRUBER Hans-Peter eKaul Gernot eBodner Dissection of drought response of modern and underutilized wheat varieties according to Passioura’s yield-water framework Frontiers in Plant Science drought resistance Phenology Stomatal conductance Water use efficiency Genetic resources |
| title | Dissection of drought response of modern and underutilized wheat varieties according to Passioura’s yield-water framework |
| title_full | Dissection of drought response of modern and underutilized wheat varieties according to Passioura’s yield-water framework |
| title_fullStr | Dissection of drought response of modern and underutilized wheat varieties according to Passioura’s yield-water framework |
| title_full_unstemmed | Dissection of drought response of modern and underutilized wheat varieties according to Passioura’s yield-water framework |
| title_short | Dissection of drought response of modern and underutilized wheat varieties according to Passioura’s yield-water framework |
| title_sort | dissection of drought response of modern and underutilized wheat varieties according to passioura s yield water framework |
| topic | drought resistance Phenology Stomatal conductance Water use efficiency Genetic resources |
| url | http://journal.frontiersin.org/Journal/10.3389/fpls.2015.00570/full |
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