Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (3): 69-76. doi: 10.7668/hbnxb.20193893

Special Issue: Wheat Drought and water saving Biotechnology Cultivation & Physiology

• Tillage & Cultivation·Physiology & Biochemistry • Previous Articles     Next Articles

Effect of Different Drought Resistance Genes on Thousand Grains Weight of Wheat

YANG Kai1,2, CHENG Xiaohu3, ZHAO Jie2, HUANG Jinan2, YU Cuihong2, ZHANG Li2, HU Mengyun2, SUN Lijing2, LI Hui2, WNAG Qingtao1, ZHANG Yingjun2   

  1. 1 School of Landscape and Ecological Engineering,Hebei University of Engineering,Handan 056038,China
    2 Institute of Cereal and Oil Crops,Hebei Academy of Agriculture and Forestry Sciences,Hebei Provincial Laboratory of Crop Genetics and Breeding,Shijiazhuang 050035,China
    3 Dingxi Academy of Agricultural Sciences,Dingxi 743000,China
  • Received:2022-11-28 Published:2023-06-28

Abstract:

To clarify the effect of different drought resistance genes on wheat grain weight, 352 main varieties (or lines) in Huang and Huai Valley wheat region were used as experimental materials. Two experimental treatments were designed, normal irrigation and drought condition. Grain weight data were investigated for three consecutive years from 2019 to 2021. KASP markers of three drought resistance genes (1-fehw3, TaDreb-B1 and Cwi-4A) were used to genotype the experimental materials, and the effects of different drought resistance genes on wheat grain weight were studied. The results showed that the KASP markers of the three genes could be used for genotyping of the experimental materials, and the effects of KASP marker of 1-fehw3 and Cwi-4A genes were better than that of TaDreb-B1 gene. The distribution frequency of the dominant alleles of 1-fehw3,TaDreb-B1 and Cwi-4A genes was 36.9%, 41.1% and 35.1%, respectively. When genotyping by single gene marker, the thousand grain weight between drought resistant and susceptible genotypes did not reach a significant level in different years and conditions. When tested using two gene markers, 1-fehw3+TaDreb-B1 showed significant differences in thousand grains weight between drought resistant and susceptible genotypes under normal irrigation in 2019 and drought in 2020; 1-fehw3+Cwi-4A reached a significant level in the 2019 and 2020 drought environments; TaDreb-B1+Cwi-4A achieved a significant level in 2020 drought environment. When tested using three genes (1-fehw3, TaDreb-B1 and Cwi-4A) markers, the thousand grains weight of drought resistant genotypes was significantly higher than that of drought susceptible genotypes in all five environments except for irrigation conditions in 2020. The results indicated that because drought resistance was a complex trait controlled by multiple genes, the contribution of a single drought resistance gene to wheat drought resistance was relatively small. However, using molecular marker assisted selection for multi gene pyramiding breeding could significantly improve wheat drought resistance.

Key words: Wheat, Drought resistant genes, Thousand grains weight

Cite this article

YANG Kai, CHENG Xiaohu, ZHAO Jie, HUANG Jinan, YU Cuihong, ZHANG Li, HU Mengyun, SUN Lijing, LI Hui, WNAG Qingtao, ZHANG Yingjun. Effect of Different Drought Resistance Genes on Thousand Grains Weight of Wheat[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(3): 69-76. doi: 10.7668/hbnxb.20193893.

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