Contribution of Awns to Seed Yield and Seed Shattering in Siberian Wildrye Grown under Irrigated and Rainfed Environments

The seed yield of grass species is greatly dependent on inflorescence morphological traits, starting with spikelets per inflorescence and seeds per spikelet, to kernel size, and then to awns. Previous studies have attempted to estimate the contribution of these traits on the harvested yield of major...

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Autores principales:	Fabrice Ntakirutimana, Yiyang Wan, Wenhui Liu, Wengang Xie
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	abscission layer awns <i>Elymus sibiricus</i> grasses inflorescence morphology photosynthesis Agriculture S
Acceso en línea:	https://doaj.org/article/24a93182143744d0b90dc9a12095dbdd
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id	oai:doaj.org-article:24a93182143744d0b90dc9a12095dbdd
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spelling	oai:doaj.org-article:24a93182143744d0b90dc9a12095dbdd2021-11-25T16:07:14ZContribution of Awns to Seed Yield and Seed Shattering in Siberian Wildrye Grown under Irrigated and Rainfed Environments10.3390/agronomy111122192073-4395https://doaj.org/article/24a93182143744d0b90dc9a12095dbdd2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4395/11/11/2219https://doaj.org/toc/2073-4395The seed yield of grass species is greatly dependent on inflorescence morphological traits, starting with spikelets per inflorescence and seeds per spikelet, to kernel size, and then to awns. Previous studies have attempted to estimate the contribution of these traits on the harvested yield of major cereal crops, but little information can be accessed on the influence of awns on seed yield of forage grass species. Siberian wildrye (<i>Elymus sibiricus</i> L.) is a widely important perennial forage grass used to increase forage production in arid and semi-arid grasslands. The grass has long inflorescences with long awns developed at the tip end of the lemmas in the florets. In order to evaluate the effect of awns on Siberian wildrye seed production, awn excision analyses from 10 accessions were performed at flowering stage under irrigated and rainfed regimes. Overall, awn excision reduced thousand-seed weight and seed size under both irrigated and rainfed regimes, which decreased final seed yield per plant. De-awned plants produced significantly more seeds per inflorescence, but spikelets per inflorescence was not influenced by awn excision in either condition. Moreover, histological analyses showed a high degradation of the abscission layer in the awned plants than de-awned ones, and awn excision evidently improved average seed breaking tensile strength (BTS), and thus decreased the degree of seed shattering. In conclusion, the observed significant impact of awn excision on different yield-related traits mirrored the impact of awns on the performance of Siberian wildrye under diverse growing conditions. These results provide useful information for plant breeders, seed producers, and researchers to efficiently improve seed production in Siberian wildrye.Fabrice NtakirutimanaYiyang WanWenhui LiuWengang XieMDPI AGarticleabscission layerawns<i>Elymus sibiricus</i>grassesinflorescence morphologyphotosynthesisAgricultureSENAgronomy, Vol 11, Iss 2219, p 2219 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	abscission layer awns <i>Elymus sibiricus</i> grasses inflorescence morphology photosynthesis Agriculture S
spellingShingle	abscission layer awns <i>Elymus sibiricus</i> grasses inflorescence morphology photosynthesis Agriculture S Fabrice Ntakirutimana Yiyang Wan Wenhui Liu Wengang Xie Contribution of Awns to Seed Yield and Seed Shattering in Siberian Wildrye Grown under Irrigated and Rainfed Environments
description	The seed yield of grass species is greatly dependent on inflorescence morphological traits, starting with spikelets per inflorescence and seeds per spikelet, to kernel size, and then to awns. Previous studies have attempted to estimate the contribution of these traits on the harvested yield of major cereal crops, but little information can be accessed on the influence of awns on seed yield of forage grass species. Siberian wildrye (<i>Elymus sibiricus</i> L.) is a widely important perennial forage grass used to increase forage production in arid and semi-arid grasslands. The grass has long inflorescences with long awns developed at the tip end of the lemmas in the florets. In order to evaluate the effect of awns on Siberian wildrye seed production, awn excision analyses from 10 accessions were performed at flowering stage under irrigated and rainfed regimes. Overall, awn excision reduced thousand-seed weight and seed size under both irrigated and rainfed regimes, which decreased final seed yield per plant. De-awned plants produced significantly more seeds per inflorescence, but spikelets per inflorescence was not influenced by awn excision in either condition. Moreover, histological analyses showed a high degradation of the abscission layer in the awned plants than de-awned ones, and awn excision evidently improved average seed breaking tensile strength (BTS), and thus decreased the degree of seed shattering. In conclusion, the observed significant impact of awn excision on different yield-related traits mirrored the impact of awns on the performance of Siberian wildrye under diverse growing conditions. These results provide useful information for plant breeders, seed producers, and researchers to efficiently improve seed production in Siberian wildrye.
format	article
author	Fabrice Ntakirutimana Yiyang Wan Wenhui Liu Wengang Xie
author_facet	Fabrice Ntakirutimana Yiyang Wan Wenhui Liu Wengang Xie
author_sort	Fabrice Ntakirutimana
title	Contribution of Awns to Seed Yield and Seed Shattering in Siberian Wildrye Grown under Irrigated and Rainfed Environments
title_short	Contribution of Awns to Seed Yield and Seed Shattering in Siberian Wildrye Grown under Irrigated and Rainfed Environments
title_full	Contribution of Awns to Seed Yield and Seed Shattering in Siberian Wildrye Grown under Irrigated and Rainfed Environments
title_fullStr	Contribution of Awns to Seed Yield and Seed Shattering in Siberian Wildrye Grown under Irrigated and Rainfed Environments
title_full_unstemmed	Contribution of Awns to Seed Yield and Seed Shattering in Siberian Wildrye Grown under Irrigated and Rainfed Environments
title_sort	contribution of awns to seed yield and seed shattering in siberian wildrye grown under irrigated and rainfed environments
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/24a93182143744d0b90dc9a12095dbdd
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Contribution of Awns to Seed Yield and Seed Shattering in Siberian Wildrye Grown under Irrigated and Rainfed Environments

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