VARIABILITY IN POD FILLING CHARACTERISTICS OF PEAS (Pisum sativum L.) UNDER FIELD CONDITIONS

A New Hybrid Model for Panicle Growth in Rice (Oryza sativa L.)

“…Recently, breeders have turned to studies of grainfilling rates and duration as possible alternate measures of physiological efficiency (DAY-NARD et al 1971, CROSS 1975. In most instances, the duration of grain development was more closely related to yield than filling rates (AsANA and BAGGA 1966, MAHON andHOBBS 1983). The objective of this study is (i) to develop a suitable model for grain development and (ii) to find out which of the two components greatly influences the grain yield.…”

An Analysis of Grain Development in Oryza sativa L. Cultivars

“…To sum up, assuming that the development of individual grains within a panicle is synchronous (MAHON and HOBBS 1983), the study indicates the following: a) early maturing rice cultivars take about 30 days from anthesis to grain maturity, b) the effective grain filling period is only 10 days between 3rd and 13th day from anthesis during which almost 70 % of final grain matter is accumulated, and c) rate of grain filling is the major determinant of final grain weight rather than duration of filling. With wide variation in rate of gram filling among rice germplasm there is ample scope for further improvement in grain weight and hence yield in rice through either genetic or chemical manipulation.…”

“…The final grain yield is the product of rate of grain filling and the duration of effective filling period (DAYNARD et al 1971). Detailed studies in legumes have shown that seed growth is not uniform throughout the filling period (MAHON and HoBBS 1983). Instead seeds have periods of rapid growth separated by distinct lag periods with slower growth.…”

Functional Growth Model for Pod Development in Greengram and Blackgram

“…Recently, plant breeders have turned to studies of pod filling rates and duration as possible alternate measures of physiological efficiency (DAYNARD et al 1971, CROSS 1975. These studies in general revealed genetic variation for rate as well as duration of pod filling and in most instances the duration of pod development was more closely related to yield than filling rate (ASANA andBAGGA 1966, MAHON andHOBBS 1983). Objectives of the present study were to determine (i) whether interspecific variation exist for duration and rate of pod development in greengram {Vigna radiata L.…”