The combination of dwarfing genes Rht4 and Rht8 reduced plant height, improved yield traits of rainfed bread wheat (Triticum aestivum L.)

Du, Yingying; Chen, Liang; Wang, Yushen; Yang, Zhaohui; Iqbal, Saeed; Daoura, Bachir Goudia; Hu, Yin‐Gang

doi:10.1016/j.fcr.2017.10.015

Cited by 37 publications

(27 citation statements)

References 33 publications

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“…Plant height affects lodging, disease resistance [76], quality [77] and yield [78] in wheat and therefore, has been an important breeding target since the mid-nineteenth century [79]. The reduced height phenotype which revolutionized the wheat yield worldwide could be mainly attributed to the Japanese varieties ‘Norin 10’ carrying the Rht-B1b (or Rht1 on chromosome 4B), Rht-D1b (or Rht2 on chromosome 4D) genes and ‘Akakomugi’ carrying the Rht8 (on chromosome 2D) gene [79, 80].…”

Section: Discussionmentioning

confidence: 99%

Genome wide genetic dissection of wheat quality and yield related traits and their relationship with grain shape and size traits in an elite × non-adapted bread wheat cross

Kumar¹,

Mantovani²,

Şimşek³

et al. 2019

PLoS ONE

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The genetic gain in yield and quality are two major targets of wheat breeding programs around the world. In this study, a high density genetic map consisting of 10,172 SNP markers identified a total of 43 genomic regions associated with three quality traits, three yield traits and two agronomic traits in hard red spring wheat (HRSW). When compared with six grain shape and size traits, the quality traits showed mostly independent genetic control (~18% common loci), while the yield traits showed moderate association (~53% common loci). Association of genomic regions for grain area (GA) and thousand-grain weight (TGW), with yield suggests that targeting an increase in GA may help enhancing wheat yield through an increase in TGW. Flour extraction (FE), although has a weak positive phenotypic association with grain shape and size, they do not share any common genetic loci. A major contributor to plant height was the Rht8 locus and the reduced height allele was associated with significant increase in grains per spike (GPS) and FE, and decrease in number of spikes per square meter and test weight. Stable loci were identified for almost all the traits. However, we could not find any QTL in the region of major known genes like GPC-B1, Ha, Rht-1, and Ppd-1. Epistasis also played an important role in the genetics of majority of the traits. In addition to enhancing our knowledge about the association of wheat quality and yield with grain shape and size, this study provides novel loci, genetic information and pre-breeding material (combining positive alleles from both parents) to enhance the cultivated gene pool in wheat germplasm. These resources are valuable in facilitating molecular breeding for wheat quality and yield improvement.

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Section: Discussionmentioning

confidence: 99%

Genome wide genetic dissection of wheat quality and yield related traits and their relationship with grain shape and size traits in an elite × non-adapted bread wheat cross

Kumar¹,

Mantovani²,

Şimşek³

et al. 2019

PLoS ONE

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“…A comparison of the QTL on chromosome 2D detected in the present study to those identified in previous studies showed that these important QTL were located at an approximately equivalent or adjacent chromosomal region ( Supplementary Figure S2 ). Moreover, Rht8 , one of gibberellin-responsive (GAR) dwarfing genes tightly linked with WMC503 and XGWM261 ( Korzun et al, 1998 ; Du et al, 2018 ), was mapped on chromosome 2DS ( Supplementary Figure S1 ). There was a large interval between cluster 3 and WMC503 / XGWM261 .…”

Section: Discussionmentioning

confidence: 99%

QTL Detection for Kernel Size and Weight in Bread Wheat (Triticum aestivum L.) Using a High-Density SNP and SSR-Based Linkage Map

Zhang

et al. 2018

Front. Plant Sci.

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High-density genetic linkage maps are essential for precise mapping quantitative trait loci (QTL) in wheat (Triticum aestivum L.). In this study, a high-density genetic linkage map consisted of 6312 SNP and SSR markers was developed to identify QTL controlling kernel size and weight, based on a recombinant inbred line (RIL) population derived from the cross of Shixin828 and Kenong2007. Seventy-eight putative QTL for kernel length (KL), kernel width (KW), kernel diameter ratio (KDR), and thousand kernel weight (TKW) were detected over eight environments by inclusive composite interval mapping (ICIM). Of these, six stable QTL were identified in more than four environments, including two for KL (qKL-2D and qKL-6B.2), one for KW (qKW-2D.1), one for KDR (qKDR-2D.1) and two for TKW (qTKW-5A and qTKW-5B.2). Unconditional and multivariable conditional QTL mapping for TKW with respect to TKW component (TKWC) revealed that kernel dimensions played an important role in regulating the kernel weight. Seven QTL-rich genetic regions including seventeen QTL were found on chromosomes 1A (2), 2D, 3A, 4B and 5B (2) exhibiting pleiotropic effects. In particular, clusters on chromosomes 2D and 5B possessing significant QTL for kernel-related traits were highlighted. Markers tightly linked to these QTL or clusters will eventually facilitate further studies for fine mapping, candidate gene discovery and marker-assisted selection (MAS) in wheat breeding.

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“…and Rht13, are responsive to GA 3 , and produce no reduction in coleoptile length, a reduced effect on seedling root characteristics and a more moderate decrease in plant height (Liu et al, 2017;Wang et al, 2014Wang et al, , 2015Yan & Zhang, 2017). Such Rht genes may be useful alternatives to Rht-B1b and Rht-D1b for wheat genotypes specifically bred for drought tolerance and adaptation to dry environments (Daoura, Chen, Du, & Hu, 2014;Du et al, 2018). In particular, the…”

Section: Some Semi-dwarf Mutant Alleles Offer a Promising Alternatimentioning

confidence: 99%

Green revolution ‘stumbles’ in a dry environment: Dwarf wheat with Rht genes fails to produce higher grain yield than taller plants under drought

Jatayev

Sukhikh

Vavilova

et al. 2020

Plant Cell & Environment

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The combination of dwarfing genes Rht4 and Rht8 reduced plant height, improved yield traits of rainfed bread wheat (Triticum aestivum L.)

Cited by 37 publications

References 33 publications

Genome wide genetic dissection of wheat quality and yield related traits and their relationship with grain shape and size traits in an elite × non-adapted bread wheat cross

Genome wide genetic dissection of wheat quality and yield related traits and their relationship with grain shape and size traits in an elite × non-adapted bread wheat cross

QTL Detection for Kernel Size and Weight in Bread Wheat (Triticum aestivum L.) Using a High-Density SNP and SSR-Based Linkage Map

Green revolution ‘stumbles’ in a dry environment: Dwarf wheat with Rht genes fails to produce higher grain yield than taller plants under drought

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