본 연구는 기장 종자의 발아활력 증진과 입모 균일성을 통한 안정적인 생산을 위해 염수선(비중) 종자정선을 활용한 통한 발아율, 유모의 소질 및 포장 출현율을 알아보고자 수행하였다. 1. 염수선에 따른 기장은 비중이 높아질수록 천립중이 증가 하였으며, 표준발아에서는 정선 종자에서 3품종 모두 91% 이상 발아율을 보였으며, 비중선 1.040 g l-1에서 ‘황금’ 98.9%, ‘이백찰’ 99.4%, ‘황실찰’ 98.9%로 가장 높았다. 2. 모 소질을 조사한 결과 초장에서는 비정선 종자에 비해, 정선된 종자에서 평균 초장은 2.0, 2.2 및 1.9 cm 길었고, 엽장에서는 ‘황금’과 ‘이백찰’에서만 유의성이 있었으며, 경직경과 SPAD에서는 염수선 비중에 따른 유의성이 보이지 않았다. 3. 염수선에 정선된 종자의 평균 근장, 근중 및 경중 모두 길거나 무거웠으며, 근장에서는 1.040 g l-1에서 비정선 종자에 비해 2.9, 3.0 및 2.9 cm 길게 나타났고, 근중과 경중에서도 1.040 g l-1에서 가장 무겁게 조사되었다. 4. 포장 발아활력 검정에서는 품종에 따라 평균출아일수에서만 유의성이 있었으며, 염수선 처리에서는 출아율 및 출아율지수에서 고도의 유의성이 나타났다. 3품종 모두 비중선이 높을수록 출아율과 출아율지수가 증가하였고, 비중선 1.040 g l-1 에서 가장 높은 90.7, 85.3 및 92.8% 출아율이 나타났다. 5. 기장의 출아율 증진과 입모 균일성 향상을 통한 생산성 증대를 위해서는 염수선을 통해 비중선 1.040 g l-1에서의 종자를 선별이 유리한 것으로 사료된다.
The experiment was implemented to gain basic data for stable proso millet (Panicum miliaceum L.) production through germination viability and establishment uniformity based on seed refining under seed selection with specific gravity of proso millet seed. Seeds of three proso millet cultivars were carefully selected by adjusting NaCl into 9 levels (1.000, 1.005, 1.010, 1.015, 1.020, 1.025, 1.030, 1.035, 1.04 g·L-1), and their standard germination rate, seeding quality and field emergence rate were investigated. Proso millets showed heavier thousand seed weight as specific gravity high. In standard germination, all of the 3 cultivars of selected seeding showed at least 91% germination rate. With respect to the 1.040 g·L-1 selection by specific gravity, ‘Hwanggeum’ had 98.9%, 'Ibaekchal', 99.4%, and 'Hwangsilchal', 98.9%, recording the highest. Seeding quality was investigated and it was found that, compared with the non-selected seeds, selected seeds had longer plant heights and averaged 2.0, 2.2 and 1.9 cm, respectably. In terms of leaf length, only ‘Hwanggeum’ and 'Ibaekchal’ showed distinctive differences. No significance was found in stem diameter and SPAD. The seeds selected using specific gravity all had longer or heavier average root length, root weight and stem weight. Compared with non-selected seeds, the specific gravity of 1.040 g·L-1 had longer root lengths of 2.9, 3.0 and 2.9 cm. 1.040 g·L-1 was also found to have the heaviest root weight, and stem weight. The field emergence viability investigation found significance solely in the mean emergence time (MET) by the cultivar. High significance was found in percent emergence (PE) and emergence rate index (ERI) in the specific gravity for the selection of seeds. All of the three cultivars showed higher PE and ERI as specific gravity selection high. The 1.040 g·L-1 specific gravity selection had the highest PE of 90.7, 85.3 and 92.8%. For productivity increase based on improved proso millet germination rate and enhanced establishment uniformity, it seems favorable to employ 1.040 g·L-1 specific gravity selection using salt solution.