육성연대가 다른 보리품종의 생리, 형태적 특성변화와 수량성과의 관계를 구명하여 육종 및 재배법개선의 기초자료로 삼고져 보리 9품종을 2시비수준에서 재배하여 조사, 분석한 결과는 다음과 같다. 1. 근년에 육성된 품종들은 과거에 육성된 품종들에 비하여 엽록소함량, 엽신질소함량, 근활력, 근중, 비엽중(SLW) 및 순동화율이 높은 반면 엽면적지수는 낮았다. 2. 근년에 육성된 품종의 건물생산은 NAR보다 LAI와 밀접한 관계가 있었으나 과거에 육성된 품종은 반대의 경향이었다. 3. 엽층의 분포가 신품종들은 상하부에 고르게 분포되어 있으나 과거에 육성된 품종은 중상부에 집중되어 있었다. 4. 수량과 상관이 높았던 요인들은 엽록소함량, 근활력, 순동화율, 엽신질소함량 등이었으며, Stepwise multiple regression분석에서 엽록소함량, 근활력, 지상부건물중이 회귀식에 들어갔을 때 분산의 90% 정도가 되었다.

Two fertilizer levels were treated to the nine barley varieties developed at different years to investigate the morphological and physiological traits related to grain yields. Recently developed varieties were higher in amounts of chlorophyll and nitrogen content of leaf, root activity, root weight and specipic leaf weight as compared with older varieties. Dry matter production was closely related to NAR rather than LAI in new varieties, but indicating the reverse results in older varieties. They showed higher NAR and light transmission rate in new varieties but higher LAI in older varieties. Leaves in new varieties were distributed uniformly according to its position on clum. However, leaves in older varieties arranged irregularly showing more distribution at the upper and middle positions on culm. The factors which showed high correlations with grain yield were chlorophyll content, root activity, NAR, and nitrogen content of leaf of which stepwise multiple regression with grain yield indicated that 90% of total variance was occupied by chlorophyll content, root activity and dry matter.

• 南潤一(맥류연구소) | 남윤일
• 河龍雄(맥류연구소) | 하용웅