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An Increment of Crossing Efficiency with Consideration of Pollen Viability Analysis in Rose  

Hwang, Yoon Jung (Department of Horticulture, Kyungpook National University)
Song, Chang Min (Department of Horticulture, Kyungpook National University)
Kwon, Min Kyung (Gyeongsangbuk-do Agricultural Research & Extension Services)
Kim, Sung Tae (National Institute of Horticultural & Herbal Science, Rural Development Administration)
Kim, Won Hee (National Institute of Horticultural & Herbal Science, Rural Development Administration)
Han, Youn Yol (Gyeongsangbuk-do Agricultural Research & Extension Services)
Han, Tae Ho (Division of Plant Biotechnology, College of Agriculture and Life Science, Chonnam National University)
Lim, Ki Byung (Department of Horticulture, Kyungpook National University)
Publication Information
FLOWER RESEARCH JOURNAL / v.18, no.3, 2010 , pp. 193-200 More about this Journal
Abstract
Current rose cultivars are all composed of heterozygous genome due to long history of out crossing including interspecific hybridization. It has been adapted by artificial selection and crossing by breeders that mainly based on the crossing with fertile pollen derived from inter- or intra-specific hybridization. Pollen viability and germination ability tests provide valuable information for the designing of parentage for more successful breeding efficacy. In this study, we tested the pollen viability and germination ability in seven rose cultivars to find any relationship among several factors including pollen size, ploidy levels, and crossing compatibility. The pollen viability showed wide ranges from 39% 'Pinocchio' as minimum to 82% 'Scarlet Mimi' as maximum, whereas pollen germination rate were from 1% 'Mini Rosa' to 41% 'Scarlet Mimi' as a highest. Pollen size ranged from 41.3 to $45.4{\mu}m$ in large sized pollen and 30.7 to $37.4{\mu}m$ in small sized pollen. The mean diameter of large sized pollen is approximately 10-40% bigger than that of small sized pollen. There are positive relationships among ploidy level, total chromosome length, and pollen size. Crossing list showed that seed setting ratio and seed germination were related to pollen viability, pollen germination, and ploidy level.
Keywords
cultivated rose; fertilization; germination; ploidy level; pollen size;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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