Significance of Growth Habit in Soybean Breeding : I. Varietal Differences in Characteristics of Growth Habit

Response of soybean stem termination types to water stress and supplemental irrigation

“…Nagata (1960a) considered the number of nodes produced after the onset of flowering to be a major distinction between determinate and indeterminate soybeans, but not the stem termination appearance. Using this criterion, Thseng and Hosokawa (1972) grouped soybean varieties into three cate gories according to the "degree of growth habit" (DGH):…”

Differences in Flowering Habit between Determinate and Indeterminate Types of Soybean

“…Crop scientists have been facing the same problem in the soybean. The growth habit of soybean has been conventionally classified into two types, the determinate type and indeterminate type (Thseng and Hosokawa, 1972). The majority of soybean cultivars grown in Japan are determinate types, while in China, the United States of America and other soybean growing countries, indeterminate type cultivars are extensively grown.…”

Inheritance of time to flowering, time to physiological maturity and growth habit in soybeans grown at a tropical latitude

“…Such plants, i.e., neither determinate nor indeterminate, have been variously described as "half-indeterminate" ), "semi-indeterminate" (Thseng and Hosokawa, 1972a), and "semi-determinate" (Bernard, 1972).…”

“…Nagata (1960a) suggested that growth habit classification for soybeans should be based on increase in number of nodes on the main stem after initiation of flower primordia, and Thseng and Hosokawa (1972a) and Thseng (1974) According to this formula, determinates = Ofo DGH, semiNote* An error was made in Thseng and Hosokawa's 1972a paper, but it was corrected in Thseng's 1974 paper. determinates = O-50# DGH, and indeterminates = >50f DGH.…”

“…These traits have been suggested as criteria for use in selection indices (Johnson and Bernard, 1962). In determinacy (increase in height and node number after beginning bloom) has been suggested as being desirable in soybean varie ties adapted to low latitudes (Nagata, 1960b(Nagata, , 1960dLeakey and Rubaihayo, 1970;Thseng and Hosokawa, 1972a;and Camacho, 197^). More recently, Burlamaqui (1975) Kwon and Torrie (1964), and Thseng and Hosokawa (1972b).…”