Inter-Varietal Hybridization, Self-Pollination and Heritability of Cut Freesia
2021
Mohammad Hossein Azimi, | Kanani, Mehran | Barba González, Rodrigo
Floral scent, long lasting florets, and high color variation make the cut freesia one of the most popular bulbous flowers. In this work, efforts have been made to produce new cut freesia hybrids through self- and cross-pollination. Hybrids and parents were evaluated in a randomized complete block design with three repetitions in the research greenhouse of Ornamental Plants Research Center (OPRC) Mahallat, Iran (2014–2018). The highest genetic variation were registered for the length of flower peduncle, florets number and flowering stems number, where the lowest resulted for peduncle diameter, corm diameter, and cormlet number. The highest phenotypic variation coefficient was observed for peduncle diameter, number of florets, spike length, and flowering stem number. The highest and lowest potential of the general heritability was obtained for vase life, florets diameter, and flowering stem number (97.40, 92.24, and 92.21%) and corm diameter (8.90%), respectively. The highest positive and significant correlation coefficients were related to plant height with leaf length, spike length with peduncle length, and cormlet number with corm weight. Most hybrids were superior to the parents regard to the studied traits. Based on market and experts opinions, hybrids of 1, 14, 15, 16, and 20 had colors that are more beautiful. Between the hybrids, the highest plant height (P1 × P6; 16.67 cm; Cod 22), florets diameter, florets number, and flowering stems number (P1 × P5; Cod 12), and vase life (P3 × P5; 17 days; Cod 21) were produced. Consequently, Inter-varietal hybridization is an effective way to contribute to the phenotypic variations of freesia, produce new plant materials for breeding purposes, and release new cultivars.
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