Cereal Research Communications
Volume/Issue:
Volume 45: Issue 1
Dwarfing gene Rht18 from tetraploid wheat responds to exogenous GA3 in hexaploid wheat
Authors:
Z.Y. Yang Northwest A&F University, Yangling, Shaanxi, 712100, China

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C.Y. Liu Northwest A&F University, Yangling, Shaanxi, 712100, China

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Y.Y. Du Northwest A&F University, Yangling, Shaanxi, 712100, China

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L. Chen Northwest A&F University, Yangling, Shaanxi, 712100, China

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Y.F. Chen Northwest A&F University, Yangling, Shaanxi, 712100, China

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Y.G. Hu Northwest A&F University, Yangling, Shaanxi, 712100, China
Institute of Water Saving Agriculture in Arid Regions of China, Yangling, Shaanxi, 712100, China

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Pages:
23–34
Online Publication Date:
Mar 2017
Publication Date:
01 Mar 2017
Article Category:
Research Article
DOI:
https://doi.org/10.1556/0806.44.2016.050
Keywords:
agronomic traits; GA3-response; plant height; Triticum aestivum
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Rht18, derived from Triticum durum (tetraploid) wheat, is classified as a gibberellic acid (GA)-responsive dwarfing gene. Prior to this study, the responses of Rht18 to exogenous GA on agronomic traits in hexaploid wheat were still unknown. The response of Rht18 to exogenous GA3 on coleoptile length, plant height, yield components and other agronomic traits were investigated using F4:5 and F5:6 hexaploid dwarf lines with Rht18 derived from two crosses between the tetraploid donor Icaro and tall Chinese winter wheat cultivars, Xifeng 20 and Jinmai 47. Applications of exogenous GA3 significantly increased coleoptile length in both lines and their tall parents. Plant height was significantly increased by 21.3 and 10.7% in the GA3-treated dwarf lines of Xifeng 20 and Jinmai 47, respectively. Compared to the untreated dwarf lines, the partitioning of dry matter to ears at anthesis was significantly decreased while the partitioning of dry matter to stems was significantly increased in the GA3-treated dwarf lines. There were no obvious changes in plant height and dry matter partitioning in the GA3-treated tall parents. Exogenous GA3 significantly decreased grain number spike–1 while it increased 1000-kernel weight in both the dwarf lines and tall parents. Thus, applications of exogenous GA3 restored plant height and other agronomic traits of Rht18 dwarf lines to the levels of the tall parents. This study indicated that Rht18 dwarf mutants are GA-deficient lines with impaired GA biosynthesis.

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Cover Cereal Research Communications
Cereal Research Communications A Quarterly of the Cereal Research Non-Profit Ltd. Company
Print ISSN:
0133-3720
Online ISSN:
1788-9170

 

 

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Cereal Research Communications
Language English
Size A4
Year of
Foundation		 1973
Volumes
per Year		 1
Issues
per Year		 4
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0133-3720 (Print)
ISSN 1788-9170 (Online)

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