Effects of high temperature at different developmental stages on the yield of chickpea

    Devasirvatham, V and Tan, D K Y and Gaur, P M and Raju, T N and Trethowan, R M (2012) Effects of high temperature at different developmental stages on the yield of chickpea. In: Capturing opportunities and overcoming obstacles in Australian agronomy: Proceedings of 16th Australian Agronomy Conference, 14-18, October 2012, Australia.

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    Abstract

    High temperature during the reproductive stage is a major limitation to yield of chickpea (Cicer arietinum L.). Chickpea yield is sensitive to variability in temperature and rising temperature in spring and post-rainy season exposes chickpea to heat stress in Australia and India, respectively. The objective of this research was to screen chickpea germplasm for heat tolerance by analysing the mean maximum and minimum temperatures at different developmental stages (vegetative, flowering and grain filling). A total of 167 genotypes were grown under two contrasting environments viz., heat stress (late season) and non-heat stress (normal season) in field conditions during 2009-10 (Year 1) and 2010-11 (Year 2) at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, India. Principal Component Analysis (PCA) demonstrated seasonal temperature differences (normal and late seasons) very effectively. Large genetic variation was found among the genotypes for their response to heat stress. The maximum temperature during grain filling period (GFMax) reduced the grain yield in chickpea. The inbred line ICCV 98902 had higher critical temperature (≥38˚C) during the grain filling period and produced reasonable grain yield under high temperature stress.

    Item Type: Conference or Workshop Item (Paper)
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Subjects: Mandate crops > Chickpea
    Depositing User: Mr Siva Shankar
    Date Deposited: 13 Feb 2013 17:24
    Last Modified: 13 Feb 2013 17:24
    URI: http://oar.icrisat.org/id/eprint/6568
    Acknowledgement: UNSPECIFIED
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