Exploring genetic variation for salinity tolerance in chickpea using image-based phenotyping

Abstract Soil salinity results in reduced productivity in chickpea. However, breeding for salinity tolerance is challenging because of limited knowledge of the key traits affecting performance under elevated salt and the difficulty of high-throughput phenotyping for large, diverse germplasm collecti...

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Autores principales:	Judith Atieno, Yongle Li, Peter Langridge, Kate Dowling, Chris Brien, Bettina Berger, Rajeev K. Varshney, Tim Sutton
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9c9eb920fe1e4117b2eccef70e2476b0
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spelling	oai:doaj.org-article:9c9eb920fe1e4117b2eccef70e2476b02021-12-02T16:06:46ZExploring genetic variation for salinity tolerance in chickpea using image-based phenotyping10.1038/s41598-017-01211-72045-2322https://doaj.org/article/9c9eb920fe1e4117b2eccef70e2476b02017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01211-7https://doaj.org/toc/2045-2322Abstract Soil salinity results in reduced productivity in chickpea. However, breeding for salinity tolerance is challenging because of limited knowledge of the key traits affecting performance under elevated salt and the difficulty of high-throughput phenotyping for large, diverse germplasm collections. This study utilised image-based phenotyping to study genetic variation in chickpea for salinity tolerance in 245 diverse accessions. On average salinity reduced plant growth rate (obtained from tracking leaf expansion through time) by 20%, plant height by 15% and shoot biomass by 28%. Additionally, salinity induced pod abortion and inhibited pod filling, which consequently reduced seed number and seed yield by 16% and 32%, respectively. Importantly, moderate to strong correlation was observed for different traits measured between glasshouse and two field sites indicating that the glasshouse assays are relevant to field performance. Using image-based phenotyping, we measured plant growth rate under salinity and subsequently elucidated the role of shoot ion independent stress (resulting from hydraulic resistance and osmotic stress) in chickpea. Broad genetic variation for salinity tolerance was observed in the diversity panel with seed number being the major determinant for salinity tolerance measured as yield. This study proposes seed number as a selection trait in breeding salt tolerant chickpea cultivars.Judith AtienoYongle LiPeter LangridgeKate DowlingChris BrienBettina BergerRajeev K. VarshneyTim SuttonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Judith Atieno Yongle Li Peter Langridge Kate Dowling Chris Brien Bettina Berger Rajeev K. Varshney Tim Sutton Exploring genetic variation for salinity tolerance in chickpea using image-based phenotyping
description	Abstract Soil salinity results in reduced productivity in chickpea. However, breeding for salinity tolerance is challenging because of limited knowledge of the key traits affecting performance under elevated salt and the difficulty of high-throughput phenotyping for large, diverse germplasm collections. This study utilised image-based phenotyping to study genetic variation in chickpea for salinity tolerance in 245 diverse accessions. On average salinity reduced plant growth rate (obtained from tracking leaf expansion through time) by 20%, plant height by 15% and shoot biomass by 28%. Additionally, salinity induced pod abortion and inhibited pod filling, which consequently reduced seed number and seed yield by 16% and 32%, respectively. Importantly, moderate to strong correlation was observed for different traits measured between glasshouse and two field sites indicating that the glasshouse assays are relevant to field performance. Using image-based phenotyping, we measured plant growth rate under salinity and subsequently elucidated the role of shoot ion independent stress (resulting from hydraulic resistance and osmotic stress) in chickpea. Broad genetic variation for salinity tolerance was observed in the diversity panel with seed number being the major determinant for salinity tolerance measured as yield. This study proposes seed number as a selection trait in breeding salt tolerant chickpea cultivars.
format	article
author	Judith Atieno Yongle Li Peter Langridge Kate Dowling Chris Brien Bettina Berger Rajeev K. Varshney Tim Sutton
author_facet	Judith Atieno Yongle Li Peter Langridge Kate Dowling Chris Brien Bettina Berger Rajeev K. Varshney Tim Sutton
author_sort	Judith Atieno
title	Exploring genetic variation for salinity tolerance in chickpea using image-based phenotyping
title_short	Exploring genetic variation for salinity tolerance in chickpea using image-based phenotyping
title_full	Exploring genetic variation for salinity tolerance in chickpea using image-based phenotyping
title_fullStr	Exploring genetic variation for salinity tolerance in chickpea using image-based phenotyping
title_full_unstemmed	Exploring genetic variation for salinity tolerance in chickpea using image-based phenotyping
title_sort	exploring genetic variation for salinity tolerance in chickpea using image-based phenotyping
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/9c9eb920fe1e4117b2eccef70e2476b0
work_keys_str_mv	AT judithatieno exploringgeneticvariationforsalinitytoleranceinchickpeausingimagebasedphenotyping AT yongleli exploringgeneticvariationforsalinitytoleranceinchickpeausingimagebasedphenotyping AT peterlangridge exploringgeneticvariationforsalinitytoleranceinchickpeausingimagebasedphenotyping AT katedowling exploringgeneticvariationforsalinitytoleranceinchickpeausingimagebasedphenotyping AT chrisbrien exploringgeneticvariationforsalinitytoleranceinchickpeausingimagebasedphenotyping AT bettinaberger exploringgeneticvariationforsalinitytoleranceinchickpeausingimagebasedphenotyping AT rajeevkvarshney exploringgeneticvariationforsalinitytoleranceinchickpeausingimagebasedphenotyping AT timsutton exploringgeneticvariationforsalinitytoleranceinchickpeausingimagebasedphenotyping
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Exploring genetic variation for salinity tolerance in chickpea using image-based phenotyping

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