Chromosome groups 5, 6 and 7 harbor major quantitative trait loci controlling root traits in bread wheat (Triticum aestivum L.)

Halder, Tanushree; Liu, Hui; Chen, Yinglong; Yan, Guijun; Siddique, Kadambot H.M.

doi:10.3389/fpls.2023.1092992

Front. Plant Sci.

2023

DOI: 10.3389/fpls.2023.1092992

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Chromosome groups 5, 6 and 7 harbor major quantitative trait loci controlling root traits in bread wheat (Triticum aestivum L.)

Tanushree Halder

Hui Liu

Yinglong Chen

et al.

Abstract: Identifying genomic regions for root traits in bread wheat can help breeders develop climate-resilient and high-yielding wheat varieties with desirable root traits. This study used the recombinant inbred line (RIL) population of Synthetic W7984 × Opata M85 to identify quantitative trait loci (QTL) for different root traits such as rooting depth (RD), root dry mass (RM), total root length (RL), root diameter (Rdia) and root surface areas (RSA1 for coarse roots and RSA2 for fine roots) under controlled condition… Show more

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2024

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Cited by 2 publications

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Root Traits: A Key for Breeding Climate‐Smart Wheat (Triticum aestivum)

Nirmalaruban,

Yadav,

et al. 2024

Plant Breeding

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Climate change poses a serious threat to global food security by introducing uncertainty in production condition including water availability to growing crops. Technological intervention like improved crop adaptation and higher yield potential through breeding are immediately needed to ensure better availability of food to still growing low‐ and middle‐income societies like South Asia. Root traits, such as root system architecture, root biomass, root angle, xylem diameter, root hairs, root length and root hydraulics, are crucial for plant adaptation to variable environments, but they are often overlooked in the most of crop improvement programme because of difficulty in scoring these traits. Water banking by optimization hydraulic efficiency of vascular system through reduced root density and reduced xylem diameter can play important role for adaptation for reduced water availability. The challenges of nondestructive screening in the segregating generation hampers the genetic progress Recent advances in high‐throughput phenotyping facilities and identification of molecular markers has made the selection in breeding population feasible. This review explores how root morphology and anatomy influence water and nutrient uptake and how high‐throughput phenotyping and genotyping can facilitate the identification of root traits associated with climate resilience. As outcome of the study, we propose an ideal wheat ideotype with deep roots, narrow root angles and low axial hydraulic conductance combined with high xylem hydraulic safety in pursuit of climate‐smart wheat crops thriving under decreasing water availability throughout the growing season. In this review, we have also discussed the root‐related quantitative trait loci/genes in wheat and its related species to facilitate comparative genomic analyses and their subsequent integration in the breeding programme. The review thus highlights the potential importance of optimization of metaxylem vessel size, root biomass, root length, roots hairs and understanding soil microbiota and its interaction with different root phenes in designing the better wheat ideotypes, which can offer the potential solution to climate change in the future.

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Root Traits: A Key for Breeding Climate‐Smart Wheat (Triticum aestivum)

Nirmalaruban,

Yadav,

et al. 2024

Plant Breeding

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Reduced tillering and dwarfing genes alter root traits and rhizo‐economics in wheat

Li,

He,

White

et al. 2024

Physiologia Plantarum

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The tiller inhibition (tin) and Reduced height (Rht) genes strongly influence the carbon partitioning and architecture of wheat shoots, but their effects on the energy economy of roots have not been examined in detail. We examined multiple root traits in three sets of near‐isogenic wheat lines (NILs) that differ in the tin gene or various dwarfing gene alleles (Rht‐B1b, Rht‐D1b, Rht‐B1c and Rht‐B1b + Rht‐D1b) to determine their effects on root structure, anatomy and carbon allocation. The tin gene resulted in fewer tillers but more costly roots in an extreme tin phenotype with a Banks genetic background due to increases in root‐to‐shoot ratio, total root length, and whole root respiration. However, this effect depended on the genetic background as tin caused both smaller shoots and roots in a different genetic background. The semi‐dwarf gene Rht‐B1b caused few changes to the root structure, whereas Rht‐D1b, Rht‐B1c and the double dwarf (Rht‐B1b + Rht‐D1b) decreased the root biomass. Rht‐B1c reduced the energy cost of roots by increasing specific root length, increasing the volume of cortical aerenchyma and by reducing root length, number, and biomass without affecting the root‐to‐shoot ratio. This work informs researchers using tin and Rht genes how to modify root system architecture to suit specific environments.

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Chromosome groups 5, 6 and 7 harbor major quantitative trait loci controlling root traits in bread wheat (Triticum aestivum L.)

Cited by 2 publications

References 115 publications

Root Traits: A Key for Breeding Climate‐Smart Wheat (Triticum aestivum)

Root Traits: A Key for Breeding Climate‐Smart Wheat (Triticum aestivum)

Reduced tillering and dwarfing genes alter root traits and rhizo‐economics in wheat

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