Identification of novel QTLs for grain fertility and associated traits to decipher poor grain filling of basal spikelets in dense panicle rice

Abstract High grain number is positively correlated with grain yield in rice, but it is compromised because of poor filling of basal spikelets in dense panicle bearing numerous spikelets. The phenomenon that turns the basal spikelets of compact panicle sterile in rice is largely unknown. In order to...

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Autores principales:	Sudhanshu Sekhar, Jitendra Kumar, Soumya Mohanty, Niharika Mohanty, Rudraksh Shovan Panda, Swagatika Das, Birendra Prasad Shaw, Lambodar Behera
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d6c8aa5554c54aa8ad4996f2ff0e087e
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spelling	oai:doaj.org-article:d6c8aa5554c54aa8ad4996f2ff0e087e2021-12-02T18:18:44ZIdentification of novel QTLs for grain fertility and associated traits to decipher poor grain filling of basal spikelets in dense panicle rice10.1038/s41598-021-93134-72045-2322https://doaj.org/article/d6c8aa5554c54aa8ad4996f2ff0e087e2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93134-7https://doaj.org/toc/2045-2322Abstract High grain number is positively correlated with grain yield in rice, but it is compromised because of poor filling of basal spikelets in dense panicle bearing numerous spikelets. The phenomenon that turns the basal spikelets of compact panicle sterile in rice is largely unknown. In order to understand the factor(s) that possibly determines such spikelet sterility in compact panicle cultivars, QTLs and candidate genes were identified for spikelet fertility and associated traits like panicle compactness, and ethylene production that significantly influences the grain filling using recombinant inbred lines developed from a cross between indica rice cultivars, PDK Shriram (compact, high spikelet number) and Heera (lax, low spikelet number). Novel QTLs, qSFP1.1, qSFP3.1, and qSFP6.1 for spikelet fertility percentage; qIGS3.2 and qIGS4.1 for panicle compactness; and qETH1.2, qETH3.1, and qETH4.1 for ethylene production were consistently identified in both kharif seasons of 2017 and 2018. The comparative expression analysis of candidate genes like ERF3, AP2-like ethylene-responsive transcription factor, EREBP, GBSS1, E3 ubiquitin-protein ligase GW2, and LRR receptor-like serine/threonine-protein kinase ERL1 associated with identified QTLs revealed their role in poor grain filling of basal spikelets in a dense panicle. These candidate genes thus could be important for improving grain filling in compact-panicle rice cultivars through biotechnological interventions.Sudhanshu SekharJitendra KumarSoumya MohantyNiharika MohantyRudraksh Shovan PandaSwagatika DasBirendra Prasad ShawLambodar BeheraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sudhanshu Sekhar Jitendra Kumar Soumya Mohanty Niharika Mohanty Rudraksh Shovan Panda Swagatika Das Birendra Prasad Shaw Lambodar Behera Identification of novel QTLs for grain fertility and associated traits to decipher poor grain filling of basal spikelets in dense panicle rice
description	Abstract High grain number is positively correlated with grain yield in rice, but it is compromised because of poor filling of basal spikelets in dense panicle bearing numerous spikelets. The phenomenon that turns the basal spikelets of compact panicle sterile in rice is largely unknown. In order to understand the factor(s) that possibly determines such spikelet sterility in compact panicle cultivars, QTLs and candidate genes were identified for spikelet fertility and associated traits like panicle compactness, and ethylene production that significantly influences the grain filling using recombinant inbred lines developed from a cross between indica rice cultivars, PDK Shriram (compact, high spikelet number) and Heera (lax, low spikelet number). Novel QTLs, qSFP1.1, qSFP3.1, and qSFP6.1 for spikelet fertility percentage; qIGS3.2 and qIGS4.1 for panicle compactness; and qETH1.2, qETH3.1, and qETH4.1 for ethylene production were consistently identified in both kharif seasons of 2017 and 2018. The comparative expression analysis of candidate genes like ERF3, AP2-like ethylene-responsive transcription factor, EREBP, GBSS1, E3 ubiquitin-protein ligase GW2, and LRR receptor-like serine/threonine-protein kinase ERL1 associated with identified QTLs revealed their role in poor grain filling of basal spikelets in a dense panicle. These candidate genes thus could be important for improving grain filling in compact-panicle rice cultivars through biotechnological interventions.
format	article
author	Sudhanshu Sekhar Jitendra Kumar Soumya Mohanty Niharika Mohanty Rudraksh Shovan Panda Swagatika Das Birendra Prasad Shaw Lambodar Behera
author_facet	Sudhanshu Sekhar Jitendra Kumar Soumya Mohanty Niharika Mohanty Rudraksh Shovan Panda Swagatika Das Birendra Prasad Shaw Lambodar Behera
author_sort	Sudhanshu Sekhar
title	Identification of novel QTLs for grain fertility and associated traits to decipher poor grain filling of basal spikelets in dense panicle rice
title_short	Identification of novel QTLs for grain fertility and associated traits to decipher poor grain filling of basal spikelets in dense panicle rice
title_full	Identification of novel QTLs for grain fertility and associated traits to decipher poor grain filling of basal spikelets in dense panicle rice
title_fullStr	Identification of novel QTLs for grain fertility and associated traits to decipher poor grain filling of basal spikelets in dense panicle rice
title_full_unstemmed	Identification of novel QTLs for grain fertility and associated traits to decipher poor grain filling of basal spikelets in dense panicle rice
title_sort	identification of novel qtls for grain fertility and associated traits to decipher poor grain filling of basal spikelets in dense panicle rice
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d6c8aa5554c54aa8ad4996f2ff0e087e
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Identification of novel QTLs for grain fertility and associated traits to decipher poor grain filling of basal spikelets in dense panicle rice

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