福岡県農業総合試験場研究報告14（1995） pp 36 - 41
ビール大麦の側面裂皮粒・凸腹粒抵抗性の簡易検定法
吉川 亮・水田一枝・山口 修
ビール大麦における被害粒抵抗性系統の選抜の効率化を図るため，側面裂皮粒・凸腹粒抵抗性の簡易検定法について検討した。@側面裂皮粒抵抗性の簡易検定法としては，早播した材料について，節間伸長期（出穂期約３週間前〜出穂期直前）の２０日間，寒冷紗により５０％遮光処理して，収穫後に側面裂皮粒率を調査するか，または登熟後期に側面裂皮粒発生程度を観察調査する方法が良いと考えられた。A凸腹粒抵抗性の簡易検定法としては，早播した材料について，成熟期の収穫直後の穂を２０℃流水中に５日間浸漬処理した後，ガラス室で天日乾燥し脱穀する。そして，原粒を布製ネット袋に入れ，再度２０℃流水中に５日間浸漬処理した後，４０℃で通風乾燥し，凸腹粒率を調査する方法が良いと考えられた。また，凸腹粒率の代わりに千粒重の処理／無処理比を用いても，抵抗性の判定ができるものと考えられた。
［キーワード：ビール大麦，側面裂皮粒，凸腹粒，抵抗性，簡易検定法］
Simplified Tests on Resistance to Husk Underdevelopment and Grain with Ventral Swelling in Malting Barley. YOSHIKAWA Ryo, Kazue MIZUTA and Osamu YAMAGUCHI (Fukuoka Agric. Res. Cent. , chikushino, Fukuoka 818, Japan) Bull. Fukuoka Agric. Res. Cent. 14 : 36-41 (1995)
In order to make an effficient selection of lines of malting barley which was resistant to damaged grains , we investigated with simplified tests on resistance to husk underdevelopment and grain with ventral swelling. (2) The method of the simplified test on resistance to husk underdevelopment was as follows: The early sown materials were treated with 50% shading for 20 days before heading date, and the percentage of grain with husk underdevelopment was inspected after harvest. If counting of grain percentage is difficult, the degree of occurrence should be observed at yellow-ripe stage. (2) The method of simplified test on resistance to grain with ventral swelling was as follows: The spikes of early sown materials were harvested at date of maturity and were immediately soaked in running water at 20 ℃ for five days. After solar drying, the spikes were threshed. The grains were put in a cloth net bag, and they were again soaked in running water at 20 ℃ for five days. After air drying at 40 ℃, the percentage of grain with ventral swelling(PGVS) was inspected. The ratio of treatment/control of 1000 grain weight was closely related to PGVS. So it is able to use its ratio in place of PGVS if counting of grain percentage is difficult.
[Key words : Malting barley breeding, Husk underdevelopment, Grain with ventral swelling, Resistance, Simplified test]
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