Dwarfing genes Rht4 and Rht-B1b affect plant height and key agronomic traits in common wheat under two water regimes

Liu, Yuxiu; Zhang, Junli; Hu, Yin‐Gang; Chen, Jianli

doi:10.1016/j.fcr.2017.01.020

Cited by 41 publications

(47 citation statements)

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“…Влияние одного из наиболее распространенных аллелей, определяющих нечувствительность к гиббереллину, Rht-B1b, на высоту может варьировать от 10 до 25 % у мягкой пшеницы и от 30 до 40 % у твердой пшеницы по сравнению с аллелем дикого типа Rht-B1a (Mathews et al, 2006;Rebetzke et al, 2012;Subira et al, 2016;Liu et al, 2017). Снижение высоты растений в полевых опытах, вызванное наличием в геноме Rht-B1p, в наших исследованиях в опыте в Москве составило 41 %, в Краснодаре -55 %, что сопоставимо с данными других исследований, полученных в вегетационных опытах (Ellis et al, 2004;Bazhenov et al, 2015).…”

Section: Introductionunclassified

“…Как было показано (Álvaro et al, 2008), в целом у современных итальянских и испанских сортов твердой пшеницы масса одного зерна ниже, чем у стародавних, что также может быть обусловлено внедрением аллелей низкостебельности. По литературным данным, разница в массе одного зерна между низкостебельными растениями с аллелем Rht-B1b и растениями с аллелем дикого типа Rht-B1a cоставляет 5-10 % (Liu et al, 2017). По сравнению с Rht-B1b, в наших экспериментах наблюдалась бóльшая разница: разность между растениями с Rht-B1p и растениями с аллелем дикого типа Rht-B1a составила 17 и 32 % в Москве и Краснодаре соответственно.…”

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“…Это позволит увеличить стеблестой на единицу площади и сбор зерна, как показывает опыт использования сортов с наиболее распространенными аллелями низкостебельности Rht-B1b и Rht-B1е (Беспалова, 2001). Кроме того, возможно комбинирование Rht-B1p с аллелями низкостебельности, приводящими к формированию гиббереллинчувствительного фенотипа (Rebetzke et al, 2012;Liu et al, 2017), и аллелями генов яровизации и чувствительности к фотопериоду, в том числе и вновь выявленными (Shcherban et al, 2012;Kiseleva et al, 2016;Chen et al, 2018;Okada et al, 2019).…”

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Phenotypic effects of the dwarfing gene Rht-17 in spring durum wheat under two climatic conditions

et al. 2019

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Alleles of the genes, conferring a dwarfing phenotype, play a crucial role in wheat breeding, as they not only reduce plant height, ensuring their resistance to lodging, but also have a number of positive and negative pleiotropic effects on plant productivity. Durum wheat carries only two subgenomes (A and B), which limits the use of the D-subgenome genes and requires the expansion of the arsenal of dwarfing alleles and the study of their effects on height and agronomically important traits. We studied the effect of the gibberellin-insensitive allele Rht-B1p in the B2F2:3 families, developed by crossing Chris Mutant /#517//LD222 in a field experiment in Moscow and Krasnodar. In our experiments, plants homozygous for Rht-B1p were shorter than those homozygous for the wild-type allele Rht-B1a by 36.3 cm (40 %) in Moscow and 49.5 cm (48 %) in Krasnodar. In the field experiment in Krasnodar, each plant with Rht-B1p had one less internode than any plant with Rht-B1a, which additionally contributed to the decrease in plant height. Grain weight per main spike was lower in plants with Rht-B1p than in plants with Rht-B1a by 12 % in Moscow and by 23 % in Krasnodar due to a decrease in 1000 grain weight in both regions of the field experiment. The number of grains per main spike in plants with Rht-B1p was higher in comparison to that with Rht-B1a by 6.5 % in Moscow due to an increase in spikelet number per main spike and by 11 % in Krasnodar due to an increase in grain number per spikelet. The onset of heading in plants with Rht-B1p in comparison with the plants with the wild-type allele Rht-B1a was 7 days later in Krasnodar. The possibility and prospects for the use of Rht-B1p in the breeding of durum wheat are discussed.

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Section: Introductionunclassified

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Phenotypic effects of the dwarfing gene Rht-17 in spring durum wheat under two climatic conditions

et al. 2019

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“…(2) Rht-dp and Rht-B1b reduce plant height mainly via reducing the length of the rst and second internodes (Fig. 1D), and their effects on reducing plant height were similarity about 22% [18,39]. 3The sequence of Rht-B1 of DPW is the same as that of Rht-B1b (Fig.…”

Section: Discussionmentioning

confidence: 96%

“…Because Rht-B1b signi cantly decreases plant height to reduce plant lodging and increase wheat yield [37,39], it has been introduced into tetraploid wheat T. durum for dwarf breeding [28]. However, it is well known that the progenitor of T. polonicum is not Norin 10 or T. durum.…”

Section: Discussionmentioning

confidence: 99%

The semi-dwarfing gene Rht-dp from dwarf Polish wheat (Triticum polonicum L.) is the “Green Revolution” gene Rht-B1b

Chai

Qin

Zhang

et al. 2020

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Background The wheat dwarfing gene improves lodging resistance, and increases the grain number per spike and harvest index. Dwarf polish wheat (Triticum polonicum L., 2n = 4x = 28, AABB, DPW), initially collected from Tulufan, Xinjiang, China, carries a semi-dwarfing gene Rht-dp on chromosome 4BS. However, Rht-dp and its dwarfing mechanism are unknown. Results Homologous cloning and fine mapping revealed that Rht-dp is the ‘Green Revolution’ gene Rht-B1b. A haplotype analysis showed that Rht-B1b was only present in T. polonicum. Transcriptomic analysis of two pairs of near-isogenic lines (NILs) of DPW × TPW revealed 41 differentially expressed genes (DEGs) as potential dwarfism-related genes. Among them, 28 functionally annotated DEGs were classed into five sub-groups: hormone-related signalling transduction genes, transcription factor genes, cell wall structure-related genes, reactive oxygen-related genes, and nitrogen regulation-related genes. Conclusions These results indicated that Rht-dp is Rht-B1b, which regulates pathways related to hormones, reactive oxygen species, and nitrogen assimilation to modify the cell wall structure, and then limits cell wall loosening and inhibits cell elongation, thereby causing dwarfism in DPW.

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Wheat dwarf genes Rht12 and Rht‐B1b affected the performance of agronomic traits in hexaploid triticale

et al. 2022

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As a new synthetic species, triticale has been widely used for food and feed. Lodging is a severe problem in triticale production, and it is unknown whether wheat height‐reducing genes can improve lodging resistance in triticale. In this study, the wheat‐dwarfing genes Rht12 and Rht‐B1b were introgressed into hexaploid triticale (AABBRR) lines to understand their effect on plant height. The results showed that Rht12 and Rht‐B1b reduced the plant height of triticale plants by 37.7 and 29.9%, respectively. Rht12 and Rht‐B1b both had significant effects on the basal internode's length, diameter, and thickness, which may greatly improve lodging resistance. Additionally, the net photosynthetic rate was increased by 28.7% in Rht12 dwarf lines. However, Rht12 had a significant and negative effect on thousand‐kernel weight (14.5%) and yield per plant (20.6%). On the other hand, Rht‐B1b reduced the number of tillers by 19.6% and yield per plant by 18.1% with no negative effect on the harvest index. Furthermore, Rht12 and Rht‐B1b decreased grain plumpness but improved several grain quality traits. Conclusively, Rht12 and Rht‐B1b improved lodging resistance but had some negative effects on yield components, which need careful consideration in triticale breeding.

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Dwarfing genes Rht4 and Rht-B1b affect plant height and key agronomic traits in common wheat under two water regimes

Cited by 41 publications

References 42 publications

Phenotypic effects of the dwarfing gene Rht-17 in spring durum wheat under two climatic conditions

Phenotypic effects of the dwarfing gene Rht-17 in spring durum wheat under two climatic conditions

The semi-dwarfing gene Rht-dp from dwarf Polish wheat (Triticum polonicum L.) is the “Green Revolution” gene Rht-B1b

Wheat dwarf genes Rht12 and Rht‐B1b affected the performance of agronomic traits in hexaploid triticale

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