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Crop Science Abstract -

Genotypic and Phenotypic Variances and Correlations in Peas1


This article in CS

  1. Vol. 15 No. 3, p. 353-356
    Received: June 7, 1974

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  1. Shivaji Pandey and
  2. E. T. Gritton2



Eight lines of peas (Pisum sativum L.) and all possible Fl's among them were grown in five environments to study the genotypic and phenotypic variances and correlations among eight traits. Genotypes and environments had highly significant effects on all traits. Parents exhibited highly significant genotype × environment interactions but Fl's were remarkably stable.

Plant height was often positively correlated with pods/plant, seeds/plant, and yield/plant, indicating superior yielding ability of taller plants. However, indeterminate growth is unacceptable in peas for canning because of the range in maturity of peas borne at the different nodes and the excessive vine growth which interferes with harvesting. Correlations of percentage seed protein with the different traits were variable, but generally positively correlated with increased yield. There was some indication of lower protein with heavier seeds. Strong positive genotypic and phenotypic correlation coefficients obtained between pods/plant and seeds/plant, seeds/pod and seeds/ plant, and between those two traits and yield/plant, indicate that selection for either or both of these traits would result in superior yield. The genotypic correlation between weight/seed and yield was high, but the phenotypic association was low.

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