GAR dwarf gene Rht14 reduced plant height and affected agronomic traits in durum wheat (Triticum durum)

Duan, Shan; Zhao, Zhangchen; Qiao, Yue; Cui, Chunge; Morgunov, Alexey Ivanovich; Condon, Anthony G.; Chen, Liang; Hu, Yin‐Gang

doi:10.1016/j.fcr.2020.107721

Cited by 16 publications

(20 citation statements)

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“…In previous studies, the effects of Rht14 on agronomic traits in durum wheat were evaluated in China and India (Duan et al, 2020;Vikhe et al, 2019), which suggested that Rht14 could be an alternative dwarf genes for reducing plant height, increasing lodging resistance, but also showed some negative effects on some important agronomic and quality traits. Rht14 was a GA-responsive dwarf gene, we thought that those negative effects by Rht14 might F I G U R E 4 Flag leaf area, SPAD value and net photosynthetic rate at main growth stages of the GA 3 application of the dwarf and tall lines from CP × L and L × CP come from the deficiency of bioactive GAs during wheat development.…”

Section: Discussionmentioning

confidence: 99%

“…The two populations, CP × L and L × CP, were derived from the reciprocal crosses of two tetraploid wheat, the donor of Rht14 , Castelprziano, and the tall variety Langdon (Duan et al., 2020). The homozygous F 2 plants were used to generate F 2:3 , F 3:4 and F 4:5 lines, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The aim of this study was to extend the work of Duan et al. (2020) by further verifying the effects of Rht14 on vital morphological and agronomic traits with exogenous GA 3 application using the F 2:3 lines, F 3:4 lines and F 4:5 lines derived from the reciprocal crosses of CP and L, which may lay the foundation for the study of the mechanism of Rht14 in regulating plant development.…”

Section: Introductionmentioning

confidence: 92%

“…Rht14 as a GA-response dwarf gene, it is important to know its responsiveness to exogenous GA, especially on the key agronomic traits, which may facility the understanding on its mechanism and promote its application in wheat breeding program. The aim of this study was to extend the work of Duan et al (2020) by further verifying the effects of Rht14 on vital morphological and agronomic traits with exogenous GA 3 application using the F 2:3 lines, F 3:4 lines and F 4:5 lines derived from the reciprocal crosses of CP and L, which may lay the foundation for the study of the mechanism of Rht14 in regulating plant development.…”

Section: Core Ideasmentioning

confidence: 99%

“…Reports about the effects of Rht14 on important agronomic traits in durum wheat have been conducted by the cross Castelporziano × Langdon, Langdon × Castelporziano, HI8498 × Castelporziano, and it significantly reduced the plant height by 26.68%, 27.68% and 25.00% in China and India, at the same time, it had the potential to improve the lodging resistance. Rht14 did not affect the coleoptile length, seedling root traits and the seeds size and remarkably increased the flag leaf area, SPAD value and net photosynthetic rate, but notably decreased 1000‐kernel weight, and some quality traits (Duan et al., 2020; Vikhe, Venkatesan, Chavan, Tamhankar, & Patil, 2019). In addition, Rht18 was due to the higher expression of an enzyme, GA2oxA9, participating in GA biosynthesis and down regulating the bioactive GA, thus reducing the plant height, while no mutations observed in the gene encoding this enzyme (Ford et al., 2018).…”

Section: Introductionmentioning

confidence: 99%

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Vigorous responsiveness of dwarf gene Rht14 to exogenous GA₃ evaluated on important morphological and agronomic traits in durum wheat

et al. 2020

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Rht14, was considered as a GA-responsive dwarf gene in durum wheat (Triticum durum L.). The object of this paper is to understand the responsiveness of Rht14 after applying exogenous GA 3 on important morphological and agronomic traits, and its potential application in wheat breeding. In this study, the F 2:3 lines, F 3:4 lines and F 4:5 lines derived from the reciprocal crosses between the Castelporziano (CP), the donor of Rht14, and tall cultivar Langdon (L) were used to evaluate the effects of Rht14 with exogenous GA 3 application on crucial traits. After application of GA 3 , the plant height of the dwarf lines was more significantly increased by an average of 51.21% and 52.27% than that of the tall lines by 14.70% and 15.16% of the two populations, respectively, while their diameter and thickness of internodes were remarkably reduced, and their flag leaf area, SPAD value and net photosynthetic rate were markedly decreased, compared with the controls. After application of GA 3 , the spikelet number spike −1 , grain number spike −1 , and 1000-kernel weight of the dwarf lines notably increased, while no significant differences were observed on the seed length, width and thickness. Exogenous GA 3 significantly increased the coleoptile length, whereas notably reduced the max root length and total root length of the dwarf lines. Significant increases of crude protein, wet gluten, sedimentation value, stability time and development time were observed in the dwarf lines treated with GA 3. This study indicated the dwarf gene Rht14 was a GA-deficient gene and application GA 3 could rescue some negative effects by Rht14.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

Section: Core Ideasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vigorous responsiveness of dwarf gene Rht14 to exogenous GA₃ evaluated on important morphological and agronomic traits in durum wheat

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An image‐based methodology to evaluate oat panicle architecture

2023

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Panicle size and architecture are traits of major relevance for oat production as they play a key role in conditioning the potential number of grains per spikelet and in consequence grain shape, size, and distribution. The aim of this research was to propose an image-based strategy and methodology to evaluate oat panicles. Specifically, the goals were to create and deploy the foundations for a high-throughput methodology to phenotype oat panicles and to determine the optimum number of panicles needed to detect differences between genotypic means for oat panicle traits with high power. A total of 48 genotypes were evaluated in four field experiments with three true replications in two locations and 2 years. Ten panicles per experimental unit were harvested and evaluated with image analysis using MATLAB. Panicle length, width, aspect ratio, compactness, and digital biomass were obtained from the images. The heritability of all panicle traits was high between 0.76 and 0.93. A high power of 0.80 to detect significant differences at an alpha of 0.05 among genotypic means for all panicle architecture traits was reached with the use of six panicles per replication. Our results showed a highly efficient and powerful strategy to study panicle architecture in oat. This methodology could be scaled-up to efficiently phenotype large populations and provide the basis for understanding panicle architecture and grain morphology in oat.

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Fine mapping and candidate gene analysis of dwarf gene Rht14 in durum wheat (Triticum durum)

Duan

Cui

Chen

et al. 2022

Funct Integr Genomics

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GAR dwarf gene Rht14 reduced plant height and affected agronomic traits in durum wheat (Triticum durum)

Cited by 16 publications

References 34 publications

Vigorous responsiveness of dwarf gene Rht14 to exogenous GA₃ evaluated on important morphological and agronomic traits in durum wheat

Vigorous responsiveness of dwarf gene Rht14 to exogenous GA₃ evaluated on important morphological and agronomic traits in durum wheat

An image‐based methodology to evaluate oat panicle architecture

Fine mapping and candidate gene analysis of dwarf gene Rht14 in durum wheat (Triticum durum)

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GAR dwarf gene Rht14 reduced plant height and affected agronomic traits in durum wheat (Triticum durum)

Cited by 16 publications

References 34 publications

Vigorous responsiveness of dwarf gene Rht14 to exogenous GA3 evaluated on important morphological and agronomic traits in durum wheat

Vigorous responsiveness of dwarf gene Rht14 to exogenous GA3 evaluated on important morphological and agronomic traits in durum wheat

An image‐based methodology to evaluate oat panicle architecture

Fine mapping and candidate gene analysis of dwarf gene Rht14 in durum wheat (Triticum durum)

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Vigorous responsiveness of dwarf gene Rht14 to exogenous GA₃ evaluated on important morphological and agronomic traits in durum wheat

Vigorous responsiveness of dwarf gene Rht14 to exogenous GA₃ evaluated on important morphological and agronomic traits in durum wheat