Genotype + genotype by environment (GGE) interaction biplot analysis of direct wet-seeded and transplanted rice multi-location adaptation trials in the Philippines

Issue Date

12-2009

Abstract

Biplot analysis was used in selecting and recommending the best performing cultivar for a specific environment. The objectives of this study were to analyze the specificity of rice genotypes that are adapted to particular locations, to evaluate and identify possible homogeneous environments based on genotype performance, and to identify transplanted and direct-seeded rice genotypes for specific environments. Grain yield data on direct-seeded and transplanted rice, from 2004-2006 [dry (DS) and wet (WS) seasons] of the rice National Cooperative Trials (NCT), were analyzed using the GGE (genotype and genotype by environment) biplot procedure. The use of GGE biplot was helpful in identifying the best genotype for a given environment and possible homogeneous environments. For instance, PR26703-3B-PJ25 was selected for the Pampanga-Pangasinan area, being the highest yielding genotype in the region during the 2004 DS WS, while PR27842-PJ27 was selected for the Pangasinan-Tarlac area based on its performance as direct-seeded and transplanted rice in 2005 Ds and WS . PAC (Pampanga Agricultural College, Magalang, Pampanga) and PSU (Pangasinan State University, Lingayen, Pangasinan), which were consistently grouped together in mega-environments and had the same best cultivars, could be considered as homogeneous environments. The GGE biplots have identified the best genotypes based on stability and yielding ability. These genotypes are: IR77298, PR26703, C6503, PR31653, PR27842, PR30138, IR77186, C6824, and PR31561. These results also supported the NCT's findings with regards to the cultivars they have released in 2006 and 2007. PAC and PSU, which are located near each other geographically, had almost the same best cultivars and could be considered homogeneous environments. It is recommended however, that a 5-year or more data incorporated in the analysis should strengthen and confirm this particular result.

Source or Periodical Title

Philippine Journal of Crop Science

ISSN

0115-463x

Volume

34

Issue

3

Page

43-58

Document Type

Article

Frequency

tri-quarterly

Physical Description

tables, graphs

Language

English

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