Selection of early maturing rice varieties suitable for early cropping before Alisma plantago

In order to obtain basic informations for selecting early maturing rice varieties which is suitable for early cropping before Alisma plantago in the southern part of Korea. Eleven rice varieties were grown from May to September in 1999∼2001 at Sunchon Youngieon Experiment Field and yield components and yield of plants were investingated. Early maturing rice cv. Jinbubyeo showed higher rough rice yield than any other varieties used in the experiment. It showed high yield components, culm length, panicle length, number of panicles per plant, number of spikelets per panicle and ratio of ripened grains. therefore, it was concluded that Jinbubyeo was the most suitable variety with high yield for the cultivation before Alisma plantago at the southern part of Korea. The heritability of culm length number of spikelets per panicle and rough rice yield were high and that of panicle length number of panicle per plant, ratio of ripened grain and 1,000 grain wt. of milled rice were low. The rough rice yield showed highly significant positive correlations with culm length, panicle length, number of spikelets per panicles and ratio of ripened grains.

택사 앞작물 재배에 적응한 벼품종 선발

남부지방 택사 앞작물에 적합한 조생종 벼 품종의 효율적인 선발을 위한 기초자료를 얻고자 우리나라 중산간 및 산간 고랭지용으로 개량된 조생종 벼품종 11품종을 공시하여 유전력, 표현형 상관, 유전상관, 환경 상관을 조사한 결과를 요약하면 다음과 같다. 1. 다수성이며 수량구성요소가 높은 조생종 벼로서는 Jinbubyeo가 가장 적합하였다. 2. 유전력은 수당입수(91.90), 정 조수량(69.88)에서 높았고 수장, 수수, 등숙 비율을 천립중은 중간정도였다. 3. 형질 상호간의 상관관계에서 정조수량은 간장, 수장, 수수, 수당입수, 등숙 비율을, 천립중과 고도의 유의차로 정의 상관을 보였다.