Genotype x environmental interactions and stability analysis in large seeded genotypes of groundnut, Arachis hypogaea L.

Hariprasanna, K. and Lal, Chuni and Radhakrishnan, T. (2008) Genotype x environmental interactions and stability analysis in large seeded genotypes of groundnut, Arachis hypogaea L. Journal of Oilseeds Research, 25 (2). pp. 126-131.

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Abstract

Large-seeded groundnut genotypes were evaluated for three years in a single location to examine the existence of genotype x environment (G x E) interaction for pod yield and related traits. Significant G x E interaction was noticed for pod and kernel yield, indicating differential response of the genotypes in different years or environments, while for seed size, shelling percentage and proportion of sound mature kernels the interaction was non-significant. Stability analysis revealed that two genotypes (PBS 29010 and GG 20) had near unity regression coefficient (bi) for pod and kernel yield indicating general adaptation, but only GG 20 had positive phenotypic index. Another released cultivar TKG 19A exhibited significantly low bi, which indicates above average stability and low sensitivity to environmental changes, but had poor mean pod and kernel yield. The genotype ICGV 99101 recorded the highest pod and kernel yield with 21% and 10% yield advantage over the best check, GG 20, respectively. It exhibited the highest phenotypic index for pod and kernel yield, significant bi value and deviation from unity, thereby portraying the highly sensitive nature of the genotype to environmental fluctuations. The 100-seed mass in ICGV 99101 (51.3 g) was numerically superior to TKG 19A that had the highest seed size among the checks.

Item Type: Article
Author Affiliation: National Research Centre for Groundnut, P.B. No.5, Ivnagar Road, Junagadh-362 001, Gujarat
Subjects: Crop Improvement
Divisions: Groundnut
Depositing User: Mr B Krishnamurthy
Date Deposited: 09 Jan 2011 20:18
Last Modified: 09 Jan 2011 20:18
URI: http://eprints.icrisat.ac.in/id/eprint/1295

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