Evaluation of yield stability and adaptability of promising lines of cowpea in hot and dry regions

Articles in Press

Document Type : Research Paper

Authors

1 Seed and Plant Improvement Research Department, Safiabad Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Dezful, Iran

2 Seed and Plant Improvement Research Department, Southern Kerman Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Jiroft, Iran

3 Seed and Plant Improvement Research Department, Khuzestan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Ahwaz, Iran

Abstract

The results of composite variance analysis showed that the effect of year, place and the interaction of year in place were significant on all studied traits, which shows that genotypes in different places and years have different reactions. The coefficient of variation of the measured traits varied from 2.7 for the number of days to maturity to 17.9 for the grain yield trait. The results related to the central tendency showed that the changes of the measured traits were high in different regions, which indicates the high genetic diversity of the studied lines. Based on the GGE biplot method for grain yield, the first and second main components explained 47.72 and 23.13 percent of the changes, respectively. This means that the resulting biplot was able to justify 70.85% of the genotype changes and the genotype × environment interaction, which indicates the relatively high validity of the biplot diagram obtained from this study in explaining the G + GE changes. In general, according to the results of the traits evaluated in the investigated areas, analysis of grain yield stability using graphical and ranking method and considering the important trait of marketability (grain size which is a function of the weight of 100 seeds), line 7259, which is at the top of the best investigated lines in terms of seed yield and hundred seed weight, is recommended for all tested areas.

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Iranian Journal of Field Crop Science

Articles in Press, Accepted Manuscript
Available Online from 20 April 2025

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History

  • Receive Date: 18 August 2024
  • Revise Date: 23 September 2024
  • Accept Date: 09 October 2024
  • Publish Date: 20 April 2025

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