主成分分析을 利用한 콩의 播種期別 開花 및 成熟反應에 따른 品種分類

Classification of soybean genotypes based on seasonal response of flowering, and maturity by principal component analysis

This experiment was carried out to know the varietal difference of elcological variation in flowering and maturity through five times planting from April 20 to July 10 with 20-day interval for 1991-1992. Tested fifty five soybean genotypes were classified into three or four groups based on seasonal response of flowering and maturity by principal component analysis. The upper two principal components for DPF (days from planting to flowering), DPM (days from planting to maturity), and yield per plant contributed about 96, 95, 63 percent of respective total variances. Fifty-five soybean genotypes were roughly classified into four groups by the response of flowering and three groups by the response of maturity and yield per plant, respectively. The variation of DPF at different planting time in Ⅰ and Ⅱ Group was smaller than that that in Ⅲ and Ⅳ Groups, and the shortened degree of DPM along with planting time in Ⅰ group was smaller than that in Ⅱ and Ⅲ Groups. Decreasing degree of yield per plant by late planting in all groups was critical from June 20. Yuhsuzumi and Okuhara wase were seletcted for early flowering and maturity soybean materials. Jangyeobkong and Paldalkong were also picked up for medium ones, and Danyeobkong and Dogyoukong were selected for late ones.