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Analysis of Genotype‐Environment Interactions of Potato Yield 1
Author(s) -
Tai G. C. C.
Publication year - 1979
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1979.0011183x001900040003x
Subject(s) - genotype , yield (engineering) , biology , gene–environment interaction , solanum tuberosum , linear regression , horticulture , zoology , statistics , genetics , mathematics , physics , gene , thermodynamics
Three methods were used to study genotype‐environment (GE) interactions of potato ( Solanum tuberosum L.) yield. They were chosen to represent single (stability variance σ 1 of Shukla, 1972), two (genotypic stability parameters α, λ of Tai, 1971), and three (genotypic components v 1 , v 2 and v 3 of Tai, 1975) parameters of measurement of genotypic contributions to the GE interactions. Data of marketable yield (W) and three yield components: number of stems/plot (X), number of tubers/stem (Y), and mean tuber weight (Z) of 30 genotypes were collected from nine trials in New Brunswick. Significant differences were found for σ 2 , α, and λ among the genotypes. The estimates of σ 2 were highly correlated to those of λ. Both parameters showed a curvilinear relationship with v 1 and v 2 suggesting low σ 2 and λ values were due to moderate genotypic responses to the environmental components (r 1 and r 2 ) supporting X and Y. The linear response parameter α showed close association with v 3 which measured the genotypic response to the environmental component (r 3 ) supporting Z. The estimates of v 3 showed a moderately positive correlation with the mean marketable yield (W) and were larger than those of v 1 and v 2 for most genotypes. The estimates of r 3 were larger and more variable than those of r 1 and r 2 over the environments. It is thus concluded that difficulty would be encountered locating high yielding genotypes without sensitive responses to the variation of r 3 .