Alagarswamy, G. and Chandra, S. (1998) Pattern analysis of international sorghum multi-environment trials for grain-yield adaptation. Theoretical and Applied Genetics, 96 (3-4). pp. 397-405.
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Abstract
Pattern analysis, which consists of joint and complementary use of classification and ordination techniques, was applied to grain-yield data of 12 sorghum genotypes in 25 environments to identify the grouping of genotypes and environments. The 12 genotypes represented a wide geographical origin, different genetic diversity, and three photoperiod-sensitive classes. The 25 environments represented a super population of widely different environments covering latitudes from 20°S to 45°N. The knowledge of environmental and genotype grouping helped reveal several patterns of genotype×environment (GE) interaction. The existence of two mega-environments – African and Asian – was indicated. Within these mega-environments, several subgroups were further discernible. The Asian-type subgroups of environments tended to be closer to one another, suggesting that they discriminated genotypes similarly. By contrast, the African-type sub-groups of environments were more divergent. Differential genotype adaptation patterns existed in the two mega-environments. The repeatability of the GE patterns seen in this multi-environmental trial, however, needs to be established over time
| Item Type: | Article |
|---|---|
| Author Affiliation: | International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru Post, Andhra Pradesh 502 324, India |
| Subjects: | Plant Production Crop Improvement |
| Divisions: | Sorghum |
| Depositing User: | Syamala |
| Date Deposited: | 28 Jul 2011 08:54 |
| Last Modified: | 28 Jul 2011 08:54 |
| Official URL: | http://dx.doi.org/10.1007/s001220050755 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/2497 |
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