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Effect of drought on water
use efficiency, agronomic traits and yield of spring wheat
landraces and modern varieties in Northwest China
Liu Yong’an1,2,
Dou Quanwen1, Chen Zhiguo1* and Zhao
Deyong1,2
1Northwest
Plateau Institute of Biology, the Chinese Academy of
Sciences, Xining 810008, P. R. China.
2Graduate School of Chinese Academy of Sciences, Beijing 100039, P. R.
China.
*Corresponding
author.
E-mail:
zgchen@nwipb.ac.cn.
Tel:
+86 971 6143763. Fax: +86 971 6143282.
Accepted 20
April, 2010 |
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A pot
experiment with five typical landraces (Heshangtou, Hongnong
No. 1, Dingxi 24, Damaizi and Jieba), three modern varieties
(Qingchun 533, Plateau 602 and Abbondanza) and two water
levels was carried out in the present study. The result
showed that fertile spike, plant height, grains number of
main spike (except Dingxi 24), above ground dry material,
grain yield and grain yield water use efficiency of all
varieties decreased, but grain weight (except Qingchun 533
and Plateau 602) and harvest index (except Plateau 602) of
all varieties increased from 70% to 40% field capacity. The
landraces had more fertile spikes, higher plant height, more
above ground dry material (except Jieba), higher evaporation
transpiration and lower harvest index than modern varieties
under both 70% and 40% field capacity. Modern varieties had
more grain number of main spike and grain weight than
landraces under 70% field capacity on the whole. Although
Qingchun 533 and Abbondanza had higher leaf-level water use
efficiency than other varieties from heading stage to 30
days after anthesis, still they had lower grain yield water
use efficiency than Heshangtou, Dingxi 24 and Damaizi under
40% field capacity. Varieties with higher evaporation
transpiration and above ground dry material (higher ability
of soil moisture capture) always had higher grain yield,
grain yield water use efficiency and drought tolerance under
drought stress.
Key words: Landrace, leaf-level water use efficiency,
grain yield water use efficiency, drought tolerance. |
