양파 신품종 라양 육성

Abstract

Onions are one of the most important vegetable crops in Jeonnam. Its cultivated area accounts for 9,171ha out of 18,015ha, which represents 50.9%. In 2003, yellow mother bulbs, which have heavy bulb weight and were close to circular shape, were selected in Muan. The selected bulbs were self-fertilized and developed into Generation S1, and then an elite line was selected in the selected bulbs from 2005 to 2011. The selected line was generated S4 siecle, JS-8-27-3-1 was choosen and named as JS0002. A special examination was conducted in seven different areas of five different states; Muan, Goheung in Jeonnam, Changnyong in Kyungnam, Andong Kyungbuk, Jechong in Chongbok, and Jeju. Compared to other races, Rayang was 3.5cm shorter in plant height and 0.3 less in number of leaf per plant, but it was 1.4mm and 2.4mm thicker in diameter of leaf and pseudostem diameter. As a result of the examination, it was founded that super-species was not a check variety from a purebred variety, but F₁, if a check variety and F₁ growth grow and were raised in the same period, area, and by the same method. Therefore, heterosis was easily found in F₁ rather than the check variety raised by a purevred variety. As a result of the examination, it was founded that super-species was not a check variety from a purebred variety, but F₁, if a check variety and F₁ growth grow and were raised in the same period, area, and by the same method. Therefore, heterosis was easily found in F₁ rather than the check variety raised by a purevred variety. Compared to the check varieties, the number of Rayang was increased by 3.3% and its commercial yield was also increased by 8%. Onions are classified according to bulb weights: small bulbs (100-200g),medium bulbs (200-300g), and big bulbs (300g and more). Based on bulb weights, small bulbs’ proportion was lower and big bulbs’ proportion was 24.1%, which is indicated 14.1% difference. Rayang seems much superior than other check varieties because of its high yield potential and rate of big bulbs even under this kind of weather like this yeild in 2016. Although Rayang has a difficult time growing above ground, Rayang is considered as C-line to generate new promising F₁ because it is adaptable and flexible to about a rapid change in the weather in Jeonnam and more likely to become auxeses.