大豆의 密植多收型 品種選定에 關한 育種學的 硏究 2報 草型有關形質의 遺傳力에 關한 硏究 = Studies on the Improvement of Plant Type for the Dense Planting of Soybean 2. Genetic Study on the Several Characteristics Relating Soybean Canopy

다국어 초록 (Multilingual Abstract)

Studies on heritability estimates and segregation were made for several plant characters of F₂individual plants originated from crosses using five soybean varieties, and the results were summarized as follow:
1. Coefficient of variation (c.v.) expressed as percents for parents varied with locations of leaves. The c.v. far angle of petioles, length and angle of first branch, and maturity were very high, indicating that these characters were unstable genetically. However, characters such as length and width of leaves, number of main stem nodes, first flowering dates, and length of petioles showed low c.v, values, respectively. Generally low value of c.v. was obtained for length and width of leaves and length of petioles located blow 7th node of main stem, while c.v. values for the same characters above the 7th node of main stem appeared to be high.
Varietal differences in number of main stem nodes and first flowering dates showed low value of c.v. and furthermore very little differences in c.v. values between replications were found.
2. Apparent differences of heritability estimates were obtained for each plant character studied and for crosses. On the whole heritability estimates for first flowering date and maturity were higher than those for length and width of leaves. Heritability estimates for angle of leaf petioles, leaf length, and length and angle of first branch were negligible, except in certain cross combination.
Heritability estimates obtained for each leaf location were higher for length and width of leaves below 7th node of main stem compared with those above 7th node. differences of heritability estimates depending on leaf location were found to be negible for leaf angle and length.
3. Most of the characters studied in F₂segregating population were segregated in a fashion of normal distribution indicating many genes were involved in inheritances of each character. However, first flowering date of segregates between Suke #36 and Patten varieties were showing monogenic segregation, as early flowering being dominant over late flowering.

목차 (Table of Contents)

• ABSTRACT
• 材料 및 方法
• 結果 및 考察
• 摘要
• 參考 및 引用文獻