Performance, Selection indices for six cotton genotypes to yield and some Components

Abstract

According to the randomized complete block design, a field experiment was conducted at the Agricultural Research Station in the Daquq Research Station located 40 km south of Kirkuk at the longitude 28 - 44 ° east and latitude 8 - 35 ° north as a factorial experiment with three factors, six genotypes, three doses of potassium fertilizer, and two spacing between lines, the data were analyzed as a factorial experiment using the analysis of variance method, and the trait averages were compared using Duncan's multi-range test at a probability threshold of 5% for all of the traits evaluated. Montana genotype shows the superiority of No. of fruiting branches with an average of (8.15), Coker 310 genotypes No. of balls per plant with an average of (17.81), Montana genotype boll weight with an average of (4.85), and Coker 310 genotypes of Seed cotton yield per plant show an average of (87.26). While for fertilizer, it exceeded (200) Kg h-1, No. of fruiting branches with an average of (8.29), No. of balls per plant of (17.66), boll weight with an average reached (4.86), and Seed cotton yield per plant, with an average of (84.36). As for the distances between the lines, the distance exceeds 60 cm, in Seed cotton yield per plant with an average of 83.99. As for the best selection index, it was (the number of boll per plant and seed cotton yield per plant which amounted to (124.9922), and the expected genetic improvement was I1234, which included (number of fruiting branches, number of boll per plant, boll weight, and seed cotton yield per plant), which amounted to (8.7753), and the highest relative efficiency of the I2 index, which included (number of bolls per plant) as it reached 3109.95).