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Pages: 124-131

Date of Publication: 12-Oct-2022

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Study of genetic diversity and principal component analysis under limited irrigation in durum wheat (Triticum durum L.)

Author: A. R. Donga, K. N. Prajapati, P. A. Goswami, K. D. Gajjar

Category: Research Article


Drought is one of the major environmental factors affecting the yield and plant architecture of durum wheat. Days to heading, days to maturity, number of grains per spike, spike length, peduncle length, number of effective tillers per meter, plant height, protein content, sedimentation value, chlorophyll content, canopy temperature after 5 days and 15 days of anthesis like morphological, biochemical, physiological traits were measure in this study. In the current study, ten clusters of forty different durum wheat genotypes were formed, with the highest distance between clusters 6 and 10 (D2 = 373.85) followed by clusters 9 and 10 (D2 = 331.09). A total of around 73.82 percent of the overall variation seen across the forty durum wheat genotypes was explained by five main components, each having an eigenvalue ranging from 1.21 to 4.93. Different clusters 6, 9, and 10 include genotypes with particular characteristics. These genotypes may produce desirable genetic recombinants that help breeders create drought-tolerant cultivars. The PC1, PC2, PC3, PC4, and PC5 involve characters of major economic traits viz., plant height, number of grains per spike, spike length, peduncle length, 1000 grain weight, chlorophyll content, biological yield per plot, grain yield per plot, canopy temperature after 5 and 15 days of anthesis. The results of the entire experiment showed that the genotypes of durum wheat evaluated under limited irrigation circumstances had a sufficient amount of variability and diversity.

Keywords: durum wheat, genetic diversity, principal component analysis, restricted irrigation conditions