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Genetic Analysis of the Common Wheat Dwarf Mutant 20DH2-2 and QTL Mapping of Plant Height
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Limin LI1, Wen LIU1, Na ZHU1, Jiale ZHENG1, Xuerong MU1, Yang LIU1, Yesong TIAN1, Xiaohong ZHANG2, Donghong MIN1
Journal of Triticeae Crops | 2026, 46(1) : 44 - 50
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Journal of Triticeae Crops | 2026, 46(1): 44-50
• Genetics & Breeding •
Genetic Analysis of the Common Wheat Dwarf Mutant 20DH2-2 and QTL Mapping of Plant Height
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Limin LI1, Wen LIU1, Na ZHU1, Jiale ZHENG1, Xuerong MU1, Yang LIU1, Yesong TIAN1, Xiaohong ZHANG2, Donghong MIN1
Affiliations
  • 1.College of Agronomy/State Key Laboratory of Crop Stress Biology in Arid Area, Northwest A&F University, Yangling, Shaanxi 712100, China
  • 2.College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
Published: 2026-01-15 doi: 10.7606/j.issn.1009-1041.2026.01.05
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Plant height is a key trait in the growth and development of wheat and has an important impact on wheat yield. To further identify quantitative trait loci (QTL) associated with plant height in wheat, this study utilized an F2 population derived from a cross between a dwarf mutant 20DH2-2 and a tall parent 21Hs-7. Genetic analysis of plant height was conducted using a mixed dominant gene plus multi-gene inheritance model. A genetic linkage map was constructed using the screening results of 620 simple sequence repeat (SSR) molecular markers, and QTL mapping analysis was performed in combination with the plant height phenotypic data of the F2 individuals. Results showed that the optimal genetic model for plant height was 2MG-EA (two equal additive major genes). Through bulked segregant analysis (BSA), 26 polymorphic SSR markers were identified, constructing a genetic linkage map spanning 531.62 cM. Five plant height-related QTLs were detected on chromosomes 2A (two QTLs), 4A, 5A, and 6A, with logarithm of odds (LOD scores) ranging from 2.60 to 8.19 and explaining 7.97%~22.88% of phenotypic variation. Specifically, QPH-nwafu-2A.2, QPH-nwafu-4A, QPH-nwafu-5A, and QPH-nwafu-6A tightly linked to molecular markers BQ838266 (4.01 cM), Xwmc262 (3.00 cM), Xwmc524 (3.94 cM), and Xbarc107 (0.69 cM), respectively.

Wheat  /  Genetic analysis  /  Plant height  /  QTL
Limin LI, Wen LIU, Na ZHU, Jiale ZHENG, Xuerong MU, Yang LIU, Yesong TIAN, Xiaohong ZHANG, Donghong MIN. Genetic Analysis of the Common Wheat Dwarf Mutant 20DH2-2 and QTL Mapping of Plant Height[J]. Journal of Triticeae Crops, 2026 , 46 (1) : 44 -50 . DOI: 10.7606/j.issn.1009-1041.2026.01.05
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Year 2026 volume 46 Issue 1
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Article Info
doi: 10.7606/j.issn.1009-1041.2026.01.05
  • Receive Date：2025-04-02
  • Online Date：2026-09-11
  • Published：2026-01-15
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History
  • Received：2025-04-02
  • Revised：2025-05-12
Funding
Affiliations
    1.College of Agronomy/State Key Laboratory of Crop Stress Biology in Arid Area, Northwest A&F University, Yangling, Shaanxi 712100, China
    2.College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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