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Variation in drought-tolerance components and their interrelationships in the core collection of foxtail millet (Setaria italica) germplasm

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Title Variation in drought-tolerance components and their interrelationships in the core collection of foxtail millet (Setaria italica) germplasm
 
Creator Krishnamurty, Lakshmanan
 
Contributor Upadhyaya, Hari D.
Junichi, Kashiwagi
Purushothamana, Ramamoorthy
Dwivedi, Sangam
Vadez, Vincent
 
Subject subraces
water deficit.
crop productivity
ge interaction
 
Description Foxtail millet (Setaria italica (L.) P.Beauv.) is an ancient cereal cultivated worldwide in arid and marginal
lands. It is an ideal crop for the changing climate, with high photosynthetic efficiency. A trait-based selection for
drought tolerance is sought for yield stability. The present work had segregated the drought yield as total water use (T),
transpiration efficiency (TE) and harvest index (HI) and assessed the importance of these components and their
association with drought tolerance. The core collection of foxtail millet germplasm (n = 155) was evaluated in minilysimeters
under both terminal drought stress (DS) and well-watered (WW) environments. The contribution of T to
grain yield under drought was minor but the contribution of TE was positive and of HI negative. Crop duration, T and
TE positively influenced, and HI negatively influenced, shoot biomass production. Under drought, the core germplasm
accessions varied in shoot biomass, grain yield, HI and T by >3-fold and in TE by 2-fold. Categorisation of the
germplasm for TE had differentiated groups of accessions as high TE (n =17) and low TE (n = 22). Among the three
races of foxtail millet, indica was strong for T and TE, and maxima and moharia for HI, with useful exceptions.
 
Date 2016-08-17
2017-03-22T02:19:43Z
2017-03-22T02:19:43Z
 
Type Journal Article
 
Identifier http://oar.icrisat.org/id/eprint/9833
https://mel.cgiar.org/reporting/download/hash/4QehPHmh
Lakshmanan Krishnamurty, Hari D. Upadhyaya, Kashiwagi Junichi, Ramamoorthy Purushothamana, Sangam Dwivedi, Vincent Vadez. (17/8/2016). Variation in drought-tolerance components and their interrelationships in the core collection of foxtail millet (Setaria italica) germplasm. Crop and Pasture Science, 67 (8), pp. 834-846.
https://hdl.handle.net/20.500.11766/6529
Open access
 
Language en
 
Rights CC-BY-NC-4.0
 
Format PDF
 
Publisher CSIRO Publishing
 
Source Crop and Pasture Science;67,(2016) Pagination 834-846