Pattern analysis of international sorghum multi-environment trials for grain-yield adaptation

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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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
Subjects: Mandate crops > Sorghum
Depositing User: Library ICRISAT
Date Deposited: 18 Sep 2011 10:23
Last Modified: 18 Sep 2011 10:23
Official URL:
Acknowledgement: UNSPECIFIED
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