Genomic regions associated with heat stress tolerance in tropical maize (Zea mays L.)

Abstract With progressive climate change and the associated increase in mean temperature, heat stress tolerance has emerged as one of the key traits in the product profile of the maize breeding pipeline for lowland tropics. The present study aims to identify the genomic regions associated with heat...

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Autores principales:	Kaliyamoorthy Seetharam, Prakash H. Kuchanur, K. B. Koirala, Mahendra Prasad Tripathi, Ayyanagouda Patil, Viswanadh Sudarsanam, Reshmi Rani Das, Ramesh Chaurasia, Kamal Pandey, Hindu Vemuri, Madhumal Thayil Vinayan, Sudha K. Nair, Raman Babu, P. H. Zaidi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3e3b433d91d04eae89bcf108c8b0c3dd
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spelling	oai:doaj.org-article:3e3b433d91d04eae89bcf108c8b0c3dd2021-12-02T14:34:03ZGenomic regions associated with heat stress tolerance in tropical maize (Zea mays L.)10.1038/s41598-021-93061-72045-2322https://doaj.org/article/3e3b433d91d04eae89bcf108c8b0c3dd2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93061-7https://doaj.org/toc/2045-2322Abstract With progressive climate change and the associated increase in mean temperature, heat stress tolerance has emerged as one of the key traits in the product profile of the maize breeding pipeline for lowland tropics. The present study aims to identify the genomic regions associated with heat stress tolerance in tropical maize. An association mapping panel, called the heat tolerant association mapping (HTAM) panel, was constituted by involving a total of 543 tropical maize inbred lines from diverse genetic backgrounds, test-crossed and phenotyped across nine locations in South Asia under natural heat stress. The panel was genotyped using a genotyping-by-sequencing (GBS) platform. Considering the large variations in vapor pressure deficit (VPD) at high temperature (Tmax) across different phenotyping locations, genome-wide association study (GWAS) was conducted separately for each location. The individual location GWAS identified a total of 269 novel significant single nucleotide polymorphisms (SNPs) for grain yield under heat stress at a p value of < 10–5. A total of 175 SNPs were found in 140 unique gene models implicated in various biological pathway responses to different abiotic stresses. Haplotype trend regression (HTR) analysis of the significant SNPs identified 26 haplotype blocks and 96 single SNP variants significant across one to five locations. The genomic regions identified based on GWAS and HTR analysis considering genomic region x environment interactions are useful for breeding efforts aimed at developing heat stress resilient maize cultivars for current and future climatic conditions through marker-assisted introgression into elite genetic backgrounds and/or genome-wide selection.Kaliyamoorthy SeetharamPrakash H. KuchanurK. B. KoiralaMahendra Prasad TripathiAyyanagouda PatilViswanadh SudarsanamReshmi Rani DasRamesh ChaurasiaKamal PandeyHindu VemuriMadhumal Thayil VinayanSudha K. NairRaman BabuP. H. ZaidiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kaliyamoorthy Seetharam Prakash H. Kuchanur K. B. Koirala Mahendra Prasad Tripathi Ayyanagouda Patil Viswanadh Sudarsanam Reshmi Rani Das Ramesh Chaurasia Kamal Pandey Hindu Vemuri Madhumal Thayil Vinayan Sudha K. Nair Raman Babu P. H. Zaidi Genomic regions associated with heat stress tolerance in tropical maize (Zea mays L.)
description	Abstract With progressive climate change and the associated increase in mean temperature, heat stress tolerance has emerged as one of the key traits in the product profile of the maize breeding pipeline for lowland tropics. The present study aims to identify the genomic regions associated with heat stress tolerance in tropical maize. An association mapping panel, called the heat tolerant association mapping (HTAM) panel, was constituted by involving a total of 543 tropical maize inbred lines from diverse genetic backgrounds, test-crossed and phenotyped across nine locations in South Asia under natural heat stress. The panel was genotyped using a genotyping-by-sequencing (GBS) platform. Considering the large variations in vapor pressure deficit (VPD) at high temperature (Tmax) across different phenotyping locations, genome-wide association study (GWAS) was conducted separately for each location. The individual location GWAS identified a total of 269 novel significant single nucleotide polymorphisms (SNPs) for grain yield under heat stress at a p value of < 10–5. A total of 175 SNPs were found in 140 unique gene models implicated in various biological pathway responses to different abiotic stresses. Haplotype trend regression (HTR) analysis of the significant SNPs identified 26 haplotype blocks and 96 single SNP variants significant across one to five locations. The genomic regions identified based on GWAS and HTR analysis considering genomic region x environment interactions are useful for breeding efforts aimed at developing heat stress resilient maize cultivars for current and future climatic conditions through marker-assisted introgression into elite genetic backgrounds and/or genome-wide selection.
format	article
author	Kaliyamoorthy Seetharam Prakash H. Kuchanur K. B. Koirala Mahendra Prasad Tripathi Ayyanagouda Patil Viswanadh Sudarsanam Reshmi Rani Das Ramesh Chaurasia Kamal Pandey Hindu Vemuri Madhumal Thayil Vinayan Sudha K. Nair Raman Babu P. H. Zaidi
author_facet	Kaliyamoorthy Seetharam Prakash H. Kuchanur K. B. Koirala Mahendra Prasad Tripathi Ayyanagouda Patil Viswanadh Sudarsanam Reshmi Rani Das Ramesh Chaurasia Kamal Pandey Hindu Vemuri Madhumal Thayil Vinayan Sudha K. Nair Raman Babu P. H. Zaidi
author_sort	Kaliyamoorthy Seetharam
title	Genomic regions associated with heat stress tolerance in tropical maize (Zea mays L.)
title_short	Genomic regions associated with heat stress tolerance in tropical maize (Zea mays L.)
title_full	Genomic regions associated with heat stress tolerance in tropical maize (Zea mays L.)
title_fullStr	Genomic regions associated with heat stress tolerance in tropical maize (Zea mays L.)
title_full_unstemmed	Genomic regions associated with heat stress tolerance in tropical maize (Zea mays L.)
title_sort	genomic regions associated with heat stress tolerance in tropical maize (zea mays l.)
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3e3b433d91d04eae89bcf108c8b0c3dd
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Genomic regions associated with heat stress tolerance in tropical maize (Zea mays L.)

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