A major QTL controlling the tolerance to manganese toxicity in barley ( Hordeum vulgare L.)
- PDF / 2,968,644 Bytes
- 9 Pages / 547.087 x 737.008 pts Page_size
- 93 Downloads / 159 Views
A major QTL controlling the tolerance to manganese toxicity in barley (Hordeum vulgare L.) X. Huang & Y. Fan & L. Shabala & Z. Rengel & S. Shabala & M. X. Zhou
Received: 22 August 2017 / Accepted: 14 December 2017 # Springer Science+Business Media B.V., part of Springer Nature 2018
Abstract Waterlogging stress disturbs plant metabolism through increased ion (manganese and iron) toxicity resulting from the changes in the soil redox potential under hypoxic conditions. Our previous study found a significant correlation between the tolerance to Mn2+ toxicity and waterlogging stress tolerance in barley, suggesting that waterlogging tolerance could be increased by improving the tolerance to Mn2+ toxicity. In this study, a doubledhaploid (DH) population from the cross between barley varieties Yerong and Franklin (waterlogging-tolerant and sensitive, respectively) was used to identify QTL controlling tolerance to Mn2+ toxicity based on chlorophyll content and plant survival as selection criteria. Four significant QTL for plant survival under Mn2+ stress (QSur.yf.1H, QSur.yf.3H, QSur.yf.4H, and QSur.yf.6H) were identified in this population at the seedling stage. Two significant QTL (QLC.yf.3H and QLC.yf.6H) controlling leaf
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11032-017-0767-9) contains supplementary material, which is available to authorized users. X. Huang : Y. Fan : L. Shabala : S. Shabala (*) : M. X. Zhou (*) Tasmanian Institute of Agriculture, University of Tasmania, P.O. Box 46, Kings Meadows, TAS 7249, Australia e-mail: [email protected] e-mail: [email protected]
Z. Rengel School of Agriculture and Environment, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
chlorosis under Mn2+ stress were identified on chromosomes 3H and 6H close to QSur.yf.3H and QSur.yf.6H. The major QTL QSur.yf.3H, located near the marker Bmag0013, explained 21% of the phenotypic variation. The major QTL for plant survival on 3H was validated in a different DH population (TX9425/Naso Nijo). This major QTL could potentially be used in breeding programmes to enhance tolerance to both manganese toxicity and waterlogging. Keywords Barley (Hordeum vulgare L.) . Mn2+ toxicity . Waterlogging tolerance . QTL mapping
Introduction Waterlogging is one of the most hazardous natural constraints affecting agricultural crop production. Based on soil moisture or water levels, waterlogging may refer to flood, submergence, soil saturation, anoxia, or hypoxia (Ahmed et al. 2012). Soil waterlogging is generally caused by the prolonged rain or flooding in combination with poor soil drainage. The yield loss can vary with duration of the stress, soil types, and the tolerance of different species and genotypes (Bailey-Serres and Voesenek 2008; Shabala 2011). Waterlogging stress affects plant metabolism in multiple ways, with plants showing a broad range of morphological and physiological responses to waterlogging. The phenotypic features associated directly wit
Data Loading...
