TY - JOUR

T1 - Variability of photosynthesis parameters and yield in recombinant lines of bread wheat with introgressions from Triticum timopheevii into 2A chromosome under different water supply conditions

AU - Osipova, Svetlana

AU - Permyakov, Alexey

AU - Konstantinov, Dmitrii

AU - Shchukina, Ludmila

AU - Rudikovskaya, Elena

AU - Permyakova, Marina

AU - Pshenichnikova, Tatyana

N1 - The work was supported by the budget Project No. FWNR-2022‐0017 of ICG SB RAS and the budget Project of SIPPB SB RAS No FWSS‐2022‐0002.

PY - 2024/3

Y1 - 2024/3

N2 - Four lines of drought–tolerant wheat cultivar Saratovskaya 29 that carry different regions of introgression from the 2At chromosome of Triticum timopheevii into a homologous chromosome were studied for gas exchange parameters, chlorophyll fluorescence, and a shoots biomass under two contrasting watering regimes in a climatic chamber. Yield components were studied in the same lines in a greenhouse and in three field seasons. Introgression into the distal region of the short arm of 2A chromosome, limited by Xgwm1539 and Xgwm4849 microsatellite markers did not reduce the adaptive potential of the lines, one of which was characterized by the highest productivity, regardless of the environment. Introgression into the pericentromeric region of the long arm of 2A chromosome had a negative effect on the transfer of excitation energy in the light-harvesting complex of photosystem II regardless of the growing conditions and had a negative effect on productivity in the field. A homology was shown between the regions limited by Xgwm636 and Xgwm455 markers on the short arms of chromosomes 2A and 2D, as well as between regions designated by SNP markers Excalibur_c47535_389, and microsatellite marker Xgwm539 on chromosomes 2A and 2D. These regions are united by similar physiological answers to drought. For the two different introgression regions, and the most probable candidate genes are proposed associated with drought adaptation. The results confirm the assumption about the critical role of the centromeric region of the second homoeological group chromosomes of wheat for adaptation to drought.

AB - Four lines of drought–tolerant wheat cultivar Saratovskaya 29 that carry different regions of introgression from the 2At chromosome of Triticum timopheevii into a homologous chromosome were studied for gas exchange parameters, chlorophyll fluorescence, and a shoots biomass under two contrasting watering regimes in a climatic chamber. Yield components were studied in the same lines in a greenhouse and in three field seasons. Introgression into the distal region of the short arm of 2A chromosome, limited by Xgwm1539 and Xgwm4849 microsatellite markers did not reduce the adaptive potential of the lines, one of which was characterized by the highest productivity, regardless of the environment. Introgression into the pericentromeric region of the long arm of 2A chromosome had a negative effect on the transfer of excitation energy in the light-harvesting complex of photosystem II regardless of the growing conditions and had a negative effect on productivity in the field. A homology was shown between the regions limited by Xgwm636 and Xgwm455 markers on the short arms of chromosomes 2A and 2D, as well as between regions designated by SNP markers Excalibur_c47535_389, and microsatellite marker Xgwm539 on chromosomes 2A and 2D. These regions are united by similar physiological answers to drought. For the two different introgression regions, and the most probable candidate genes are proposed associated with drought adaptation. The results confirm the assumption about the critical role of the centromeric region of the second homoeological group chromosomes of wheat for adaptation to drought.

KW - Introgressions into chromosome 2A

KW - Photosynthesis

KW - Soil drought

KW - Triticum aestivum L

KW - Yield

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85152395867&origin=inward&txGid=539f16be10c5a3c5b0a787e362881b26

UR - https://www.mendeley.com/catalogue/98401b81-f577-31e1-ab04-d791b535e56e/

U2 - 10.1007/s42976-023-00372-8

DO - 10.1007/s42976-023-00372-8

M3 - Article

VL - 52

SP - 101

EP - 113

JO - Cereal Research Communications

JF - Cereal Research Communications

SN - 0133-3720

IS - 1

ER -