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Agronomy 2016, 6(2), 33; doi:10.3390/agronomy6020033

Impact of Pre-Anthesis Water Deficit on Yield and Yield Components in Barley (Hordeum vulgare L.) Plants Grown under Controlled Conditions

1
Department of Plant Production, College of Agriculture, Jordan University of Science and Technology, P.O. Box 3030, Irbid 22110, Jordan
2
Department of Horticulture and Crop Science, Faculty of Agriculture, The University of Jordan, Amman 11942, Jordan
3
International Center for Agricultural Research in the Dry Areas (ICARDA), P.O. Box 950764, Amman 11195, Jordan
4
Department of Biology and Biotechnology, Faculty of Science, The Hashemite University, P.O. Box 330127, Zarqa 13133, Jordan
5
Department of Biotechnology and Genetic Engineering, Faculty of Science and Arts, Jordan University of Science and Technology, P.O. Box 3030, Irbid 22110, Jordan
6
Department of Agronomy and Horticulture, 362D Plant Science Building, 1875 N. 38th Street, University of Nebraska, Lincoln, NE 68583-0915, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Silvio Salvi
Received: 15 March 2016 / Revised: 3 May 2016 / Accepted: 12 May 2016 / Published: 18 May 2016
(This article belongs to the Special Issue QTL Mapping of Drought Tolerance)
View Full-Text   |   Download PDF [437 KB, uploaded 18 May 2016]   |  

Abstract

Drought at pre-anthesis stages can influence barley growth and results in yield losses. Therefore, it is important to understand how drought at pre-anthesis can affect different traits associated with yield reduction in barley. The objective of this study was to understand the relevance of the genetic background of major flowering time genes in barley plants subjected to pre-anthesis drought and its impact on yield and yield components. A glasshouse experiment using a Randomized Complete Block Design was conducted to investigate the effect of drought and its timing on yield and yield components on eleven barley genotypes, which were selected to represent genetic diversity of major flowering time genes (PPDH1, PPDH2, HvVrn1, HvVrn2 and HvVrn3). Barley plants were exposed to three water regimes, non-stressed and stressed, which was applied at two pre-anthesis growth stages, tillering (SS) and stem elongation (SE). Results identified differences among genotypes in all measured traits. Grain yield, grain number and "thousand kernel weight" were reduced in all genotypes due to drought, irrespective of the growth stage. Early flowering genotypes had better performance as reflected in higher yield compared with late flowering genotypes. Results verified the fundamental importance of early flowering to improve productivity in response to pre-anthesis drought. The results of this study can help in selecting barley lines for future breeding purposes with improved resilience to drought conditions in Mediterranean environments. View Full-Text
Keywords: drought; flowering time; barley; yield components drought; flowering time; barley; yield components
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MDPI and ACS Style

Al-Ajlouni, Z.I.; Al-Abdallat, A.M.; Al-Ghzawi, A.L.A.; Ayad, J.Y.; Abu Elenein, J.M.; Al-Quraan, N.A.; Baenziger, P.S. Impact of Pre-Anthesis Water Deficit on Yield and Yield Components in Barley (Hordeum vulgare L.) Plants Grown under Controlled Conditions. Agronomy 2016, 6, 33.

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