A comparative study of screening methods for tolerance to aluminum toxicity in pigeonpea [Cajanus cajan (L.) Millspaugh]

Choudhary, A.K. and Singh, D. and Kumar, J. (2011) A comparative study of screening methods for tolerance to aluminum toxicity in pigeonpea [Cajanus cajan (L.) Millspaugh]. Australian Journal of Crop Science, 5 (11). pp. 1419-1426.

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Aluminum toxicity is a major factor limiting pigeonpea productivity in acid soils of North-eastern states of India. However, information regarding screening of genotypes for aluminum tolerance in pigeonpea is meagre. The effects of five levels of aluminum concentrations (0, 10, 20, 30 and 50 μg ml-1 Al) on 32 pigeonpea genotypes were studied by four different methods: hydroponic and sand assays (growth response methods), root re-growth and hematoxylin root staining. Significant variability was noted for tolerance to aluminum toxicity among the pigeonpea genotypes. The results of all the four screening methods were consistent, suggesting that any one of the four methods could be used for screening purpose. However, due to operative simplicity, reliable and better precision and short test period, the hematoxylin staining at 30 μg ml-1 aluminum concentration was suggested as the best method to discriminate pigeonpea genotypes for aluminum tolerance. Based on the results, most tolerant (IPA 7-10, T 7and 67 B) and most sensitive (Bahar, Pusa 9 and Pusa 2002-2) genotypes were identified for future use in breeding for aluminum tolerance in pigeonpea

Item Type: Article
Uncontrolled Keywords: Cajanus cajan, aluminum tolerance, aluminum toxicity, pigeonpea, hematoxylin staining, screening methods
Author Affiliation: Crop Improvement Division, Indian Institute of Pulses Research, Kanpur-208 024, India 2Department of Plant breeding and Genetics, College of Horticulture and Forestry, Central Agricultural University, Pasighat-791 102, Arunachal Pradesh, India
Subjects: Plant Protection > Pesticides
Soil Science and Microbiology > Microbiology
Statistics and Experimentation > Experimentation
Divisions: Pigeonpea
Depositing User: Mr. SanatKumar Behera
Date Deposited: 11 Mar 2012 13:57
Last Modified: 11 Mar 2012 13:58
Official URL: http://www.cropj.com/october2011.html
URI: http://eprints.icrisat.ac.in/id/eprint/3768

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