不知火 珠心胚 由來 新品種 開發 및 遺傳體 特性

Abstract

Citrus fruits are originated from the eastern part of the Himalayas and have been grown by human beings in the Americas, Southern Europe, Chile, and other countries in the world, including the East Asian growing. In Korea, it was an important friut that was cultivated in Jeju Island during the Three Kingdoms Period and exchanged with various parts of the Korean Peninsula, and was considered as central government present during the Joseon Dynasty. In the early 20th century, the Onju variety, which was introduced to Jeju Island from Japan, began to grow, and in the 1960s, the Onju variety was sent from Japan to Jeju by Korean resident in Japan, which gave the chance expanding the cultivation of Citrus fruit. Crops are grown in earnest only when they meet the two requirements : usability and suitability for cultivation, and they form a distinct product of breeding. Compared to the fact that citrus fruits have begun appearing in Korean history, it is only recently that the government has begun to launch the breeding programs for the development of new variety around its citrus test site. The introduction breedings, which imports the previously developed variety from outside the region and selects the appropriate variety through an adaptive test, is also seen as a form of breeding. However, the individual characteristics of the individual are different maternal and paternal strains, forming a subsequent pool that has a new genetic combination, adapting from these to the local environment. When developing a variety of species, such as mutant breeding, which induces variation and selects suitable individuals from a mutal pool, and applying the breeding technology to secure legitimacy to developed strains. One important characteristic of understanding citrus fruits as a breeding material is apomixis, which is the ability to produce fruits from cells derived from the mother without the fertilisation. Depending on embryony Citrus consist of two clsass one is monoembryony it give mono shoots the other is polyembryony has multi shoots. C. hybrid 'Shiranui', also known as 'harabang,' was introduced from Japan and grown in Jeju. It has polyembryonic characteristics, when the culture is grown with a immature seed, resulting the plantlets originated from the nucella embyos. I A study on the characteristics of the genome analysis of several varieties, the study of the characteristics of citrus genes, and the development of the gene analysis technology such as NGS was performed. The, information on the genome was revealed in NGS for the generalization, the selected systems, and the strains developed by the method of selection of variation, and the information on the variation was analyzed.