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Breeding variation based on seed traits in Iris germanica

Firouzi, M., Azimi, M. H., Hasanzadeh Davarani, F., Bakhteyari, F.
Acta horticulturae 2018 no.1201 pp. 529-534
Iris germanica, cluster analysis, crossing, cultivars, descriptive statistics, factor analysis, harvesting, hybrids, ornamental plants, parents, pollination, progeny, seed weight, seeds, Iran
This study was conducted to investigate the amount of variation in new hybrids of Iris germanica. From 34 parents of Iris germanica that were used as an open pollinater, 44 successful crosses were obtained. The length of the capsules, capsule width, number of seeds per capsule, number of days from the cross to harvest, seed weight and seed weight wet and dry were evaluated. The experimental research was conducted at the Ornamental Plants Research Center (OPRC) in Iran in 2016. The statistical analysis included descriptive statistics, simple correlation coefficient, estimation and analysis and cluster analysis factor. Correlation coefficients between the different results show that the most positive and significant correlation for seed weight wet and dry (r= +0.62) and the lowest correlation between the number of days from pollination to harvest seed capsules (r=0.06), respectively. Based on the results of the cluster analysis in Ward's method for component traits of seed three groups were classified, each with three sub-groups. The results of factor analysis showed that the four factors accounted for 51.15% of the total variation and provided new achievements to produce commercial cultivars in Iran. The average maximum length (79.4 mm) and width (32.2 mm) of the capsule obtained was found in progeny T50. The highest number of seeds (76.5) was found in progeny T6. The average of the earliest crosses was related to progeny T28 with 58 d. The highest average seed weight (28.87) and seed dry weight (8.7) belonged to progenies T25 and T28 respectively.