QTL mapping of seedling tolerance to exposure to low temperature in the maize IBM RIL population.

Maize is a cold sensitive crop that exhibits severe retardation of growth and development when exposed to cold spells during and right after germination, including the slowdown in development of new leaves and in formation of the photosynthetic apparatus. Improving cold tolerance in maize would allo...

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Autores principales:	Raeann Goering, Siri Larsen, Jia Tan, James Whelan, Irina Makarevitch
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2c49367dc62a4b84a4412cde207880d5
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spelling	oai:doaj.org-article:2c49367dc62a4b84a4412cde207880d52021-12-02T20:09:18ZQTL mapping of seedling tolerance to exposure to low temperature in the maize IBM RIL population.1932-620310.1371/journal.pone.0254437https://doaj.org/article/2c49367dc62a4b84a4412cde207880d52021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0254437https://doaj.org/toc/1932-6203Maize is a cold sensitive crop that exhibits severe retardation of growth and development when exposed to cold spells during and right after germination, including the slowdown in development of new leaves and in formation of the photosynthetic apparatus. Improving cold tolerance in maize would allow early sowing to improve crop yield by prolonging a growing season and by decreasing the negative effects of summer drought, diseases, and pests. Two maize inbreds widely incorporated into American maize germplasm, B73 and Mo17, exhibit different levels of tolerance to low temperature exposure at seedling stage. In addition, thirty seven diverse inbred maize lines showed large variation for seedling response to low temperature exposure with lines with extremely low tolerance to seedling exposure to low temperatures falling into stiff stalk, non-stiff stalk, and tropical clades. We employed the maize intermated B73×Mo17 (IBM) recombinant inbred line population (IBM Syn4 RIL) to investigate the genetic architecture of cold stress tolerance at a young seedling stage and to identify quantitative trait loci (QTLs) controlling this variation. A panel of 97 recombinant inbred lines of IBM Syn4 were used to measure, and score based on several traits related to chlorophyll concentration, leaf color, and tissue damage. Our analysis resulted in detection of two QTLs with high additive impact, one on chromosome 1 (bin 1.02) and second on chromosome 5 (bin 5.05). Further investigation of the QTL regions using gene expression data provided a list of the candidate genes likely contributing to the variation in cold stress response. Among the genes located within QTL regions identified in this study and differentially expressed in response to low temperature exposure are the genes with putative functions related to auxin and gibberellin response, as well as general abiotic stress response, and genes coding for proteins with broad regulatory functions.Raeann GoeringSiri LarsenJia TanJames WhelanIrina MakarevitchPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 7, p e0254437 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Raeann Goering Siri Larsen Jia Tan James Whelan Irina Makarevitch QTL mapping of seedling tolerance to exposure to low temperature in the maize IBM RIL population.
description	Maize is a cold sensitive crop that exhibits severe retardation of growth and development when exposed to cold spells during and right after germination, including the slowdown in development of new leaves and in formation of the photosynthetic apparatus. Improving cold tolerance in maize would allow early sowing to improve crop yield by prolonging a growing season and by decreasing the negative effects of summer drought, diseases, and pests. Two maize inbreds widely incorporated into American maize germplasm, B73 and Mo17, exhibit different levels of tolerance to low temperature exposure at seedling stage. In addition, thirty seven diverse inbred maize lines showed large variation for seedling response to low temperature exposure with lines with extremely low tolerance to seedling exposure to low temperatures falling into stiff stalk, non-stiff stalk, and tropical clades. We employed the maize intermated B73×Mo17 (IBM) recombinant inbred line population (IBM Syn4 RIL) to investigate the genetic architecture of cold stress tolerance at a young seedling stage and to identify quantitative trait loci (QTLs) controlling this variation. A panel of 97 recombinant inbred lines of IBM Syn4 were used to measure, and score based on several traits related to chlorophyll concentration, leaf color, and tissue damage. Our analysis resulted in detection of two QTLs with high additive impact, one on chromosome 1 (bin 1.02) and second on chromosome 5 (bin 5.05). Further investigation of the QTL regions using gene expression data provided a list of the candidate genes likely contributing to the variation in cold stress response. Among the genes located within QTL regions identified in this study and differentially expressed in response to low temperature exposure are the genes with putative functions related to auxin and gibberellin response, as well as general abiotic stress response, and genes coding for proteins with broad regulatory functions.
format	article
author	Raeann Goering Siri Larsen Jia Tan James Whelan Irina Makarevitch
author_facet	Raeann Goering Siri Larsen Jia Tan James Whelan Irina Makarevitch
author_sort	Raeann Goering
title	QTL mapping of seedling tolerance to exposure to low temperature in the maize IBM RIL population.
title_short	QTL mapping of seedling tolerance to exposure to low temperature in the maize IBM RIL population.
title_full	QTL mapping of seedling tolerance to exposure to low temperature in the maize IBM RIL population.
title_fullStr	QTL mapping of seedling tolerance to exposure to low temperature in the maize IBM RIL population.
title_full_unstemmed	QTL mapping of seedling tolerance to exposure to low temperature in the maize IBM RIL population.
title_sort	qtl mapping of seedling tolerance to exposure to low temperature in the maize ibm ril population.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/2c49367dc62a4b84a4412cde207880d5
work_keys_str_mv	AT raeanngoering qtlmappingofseedlingtolerancetoexposuretolowtemperatureinthemaizeibmrilpopulation AT sirilarsen qtlmappingofseedlingtolerancetoexposuretolowtemperatureinthemaizeibmrilpopulation AT jiatan qtlmappingofseedlingtolerancetoexposuretolowtemperatureinthemaizeibmrilpopulation AT jameswhelan qtlmappingofseedlingtolerancetoexposuretolowtemperatureinthemaizeibmrilpopulation AT irinamakarevitch qtlmappingofseedlingtolerancetoexposuretolowtemperatureinthemaizeibmrilpopulation
_version_	1718375052746948608

QTL mapping of seedling tolerance to exposure to low temperature in the maize IBM RIL population.

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