Drought resistance of C4 grasses under field conditions: Genetic variation among a large number of bermudagrass (Cynodon spp.) ecotypes collected from different climatic zones

Zhou, Y., Lambrides, C. J. and Fukai, S. (2013) Drought resistance of C4 grasses under field conditions: Genetic variation among a large number of bermudagrass (Cynodon spp.) ecotypes collected from different climatic zones. Journal of Agronomy and Crop Science, 199 4: 253-263. doi:10.1111/jac.12020


Author Zhou, Y.
Lambrides, C. J.
Fukai, S.
Title Drought resistance of C4 grasses under field conditions: Genetic variation among a large number of bermudagrass (Cynodon spp.) ecotypes collected from different climatic zones
Formatted title
Drought Resistance of C4 Grasses Under Field Conditions: Genetic Variation Among a Large Number of Bermudagrass (Cynodon spp.) Ecotypes Collected from Different Climatic Zones
Journal name Journal of Agronomy and Crop Science   Check publisher's open access policy
ISSN 0931-2250
1439-037X
Publication date 2013-08
Year available 2013
Sub-type Article (original research)
DOI 10.1111/jac.12020
Volume 199
Issue 4
Start page 253
End page 263
Total pages 11
Place of publication Berlin, Germany
Publisher Wiley-Blackwell Verlag GmbH
Collection year 2014
Language eng
Formatted abstract
Predictions of extreme weather resulting from climate change will present huge challenges for scientists trying to maintain and increase agricultural production. A greater frequency of dry periods is predicted placing emphasis on the development of plant varieties that are able to maintain performance in dry conditions. The aim of this research was to determine the genetic variation for drought resistance among a large range of potential pasture or turf bermudagrasses (Cynodon spp.). Four hundred and sixty genotypes including ecotypes collected from different climatic zones of Australia, and commercial cultivars were established in the field and assessed during natural and imposed drought periods. Using descriptors of drought resistance such as turf quality and green cover, genotypes were classified into different groups; 436 genotypes were clustered into ten groups in one experiment, and 72 genotypes were clustered into three groups in a second. There was a high correlation of response (r = 0.78) for 47 genotypes common to both experiments suggesting that the drought resistance techniques used to group genotypes were robust. Physiological analyses of the genotypes within the superior drought resistance groups indicated that these group members were probably able to extract more available soil water during the drought period. No commercial cultivars were found in the most drought resistance groups. These field studies also suggested that future collections of bermudagrass ecotypes designed to select for drought resistance might best be carried out from regions that experience Mediterranean climates. The field evaluations presented here did not correlate well with drought resistance determined in previously reported shallow lysimeter (40 cm deep) experiments
Keyword Biogeography
Green Couch Grass
Root
Soil water content
Turfgrass
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Queensland Alliance for Agriculture and Food Innovation
Official 2014 Collection
 
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Created: Mon, 15 Apr 2013, 16:02:48 EST by Dr Christopher Lambrides on behalf of Qld Alliance for Agriculture and Food Innovation