밀식적응 양질 다수성 무엽이 청보리 품종 다미

A New Auricleless Barley Cultivar Dami for Whole Crop Forage

총체사료용 청보리 신품종 다미 는 가축의 기호성을 개선하고 잎 비율이 높은 다수성 품종을 육성하기 위하여 1996년에 잎귀가 없는 돌연변이체 BGS60 을 모본으로, 내재해성이고 총체적성이 우수한 강보리 를 부본으로 여교잡하고 계통육종법에 의하여 제반특성이 우수한 SB962002-B-B-B-10-1 계통을 선발, 생산력검정시험과 지역적응시험을 거쳐 2007년에 육성되었다.

We developed a new barley cultivar Dami (Hordeum vulgare L.) with the auricleless gene lig (al, li, aur-a). The characteristic of auricleless is a spontaneous mutant type which has known as a monogenic recessive gene. The plant with the gene has erect leaf blades because of no auricle. The cultivar was derived from a cross between BGS60 and Kangbori . BGS60 has the auricleless gene (li), while Kangbori showed a high biomass with winter hardiness and resistance to BaYMV (Barley Yellow Mosaic Virus). Subsequent generations were handled by the bulk method in a pedigree selection program. A promising line showed both high yield and lodging resistance in the yield trials at Iksan in 2003 to 2004, and designated as Iksan414. The line was subsequently evaluated for winter hardiness, earliness, and yield in the seven locations around Korea for three years from 2005 to 2007 and was designated as Dami and released. It has the growth habit of Ⅲ, erect plant type, green leaf and stem similar to the check cultivar Sunwoo Its heading date was April 30, and maturing date May 31 in paddy field conditions, which were similar to those of Sunwoo respectively. The cultivar Dami was 97 cm in culm length, had 643 spikes per m^2 and higher leaf dry weight, and better adaptability to dense planting, winter hardiness, and resistance to BaYMV than the check cultivar did. The average forage yield of Dami was about 12 ton ha^-1 in dry matter (33 ton ha^-1 in fresh matter) in paddy field. Dami also showed 7.5% of crude protein content, 28.5% of ADF (Acid Detergent Fiber), 50.1% of NDF (Neutral Detergent Fiber), and 66.4% of TDN (Total Digestible Nutrients), including higher grade of silage quality for whole crop barley. This cultivar would be suitable for the area where the daily minimum temperature of January is above -8^℃ in Korean peninsula.