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Genetic diversity of drought-avoidance root traits in the mini-core germplasm collection of chickpea

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Title Genetic diversity of drought-avoidance root traits in the mini-core germplasm collection of chickpea
 
Creator Krishnamurthy, L
Kashiwagi, J
Upadhyaya, H D
Serraj, R
 
Subject Chickpea
 
Description Shoot and root traits related to drought resistance were studied in Cicer arietinum accessions (211 lines) and 12 cultivars (controls), and in 10 accessions of wild relatives (C. yamashitae, C. reticulatum, C. bijugum, C. pinnatifidum, C. chorassanicum, C. judaicum and C. cuneatum) grown in poly(vinyl chloride) cylinders under drought conditions. The root and shoot growth of the wild species except C. reticulatum (ICC 17123 and ICC 17124) were relatively poor compared to the C. arietinum lines. The growth of C. reticulatum was almost as good as that of the C. arietinum accessions. Rooting depth was lowest (62.0 cm) in ICC 17241 (C. chorassanicum). The variation in rooting depth among the other wild species except C. reticulatum was not significant (73-91 cm). Rooting depth did not significantly vary among the cultivars. The accessions with deep root systems included ICC 1431, ICC 8350, ICC 15697, ICC 3512 and ICC 11498. The phase of linear root growth occurred earlier in the cultivars than in the wild species; thus, lower maximum rooting depth and dry weight were recorded for the latter. The highest root dry mass (more than 1.2 g per cylinder) was observed in ICC 5337, ICC 7255, ICC 13077, ICC 15294 and ICC 8261. Most of the wild species showed very low ratio of root to total plant biomass; the majority of the cultivars and C. arietinum accessions exhibited moderate values for this parameter. The total root dry mass exhibited a significant linear relationship with total shoot dry mass and total leaf area.
 
Publisher International Crops Research Institute for the Semi-Arid Tropics, Andhra Pradesh, India
 
Date 2003
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/2894/1/Genetic_diversity_of_drought-avoidance_root_traits_in_the_mini-core_germplasm_collection_of_chickpea.pdf
Krishnamurthy, L and Kashiwagi, J and Upadhyaya, H D and Serraj, R (2003) Genetic diversity of drought-avoidance root traits in the mini-core germplasm collection of chickpea. International Chickpea and Pigeonpea Newsletter (10). pp. 21-24. ISSN 1023-4861