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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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Relation http://oar.icrisat.org/9833/
http://dx.doi.org/10.1071/CP15338
10.1071/CP15338
 
Title Variation in drought-tolerance components and their interrelationships in the core collection of foxtail millet (Setaria italica) germplasm
 
Creator Krishnamurthy, L
Upadhyaya, H D
Kashiwagi, J
Purushothaman, R
Dwivedi, S L
Vadez, V
 
Subject Foxtail Millet
Germplasm Collection
 
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 mini-lysimeters 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.
 
Publisher CSIRO
 
Date 2016-08
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/9833/2/krishnamurthy2016.pdf
Krishnamurthy, L and Upadhyaya, H D and Kashiwagi, J and Purushothaman, R and Dwivedi, S L and Vadez, V (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. ISSN 1836-0947