Author(s):

A Geetha, G Gouri Shankar and Bindu Priya

Abstract: A field study was carried out with twenty castor genotypes in Regional Agricultural Research Station, Palem from Kharif, 2014 to 2016 to asses variability in physiological parameter like LAI, SCMR, stomatal resistance along with yield and yield related parameter i.e. days to fifty percent flowering, spikes per plant, Primary spike length, 100 seed weight and seed yield. The results from the three years pooled data i.e. 2014 to 2016 revealed that PCH-111 recorded highest yield followed by PCH-222. The underlying physiological parameters contributing to the highest yield and yield related parameter is SCMR, Lower stomatal conductance with optimum LAI needed to improve seed yield under rainfed condition. Hence, these parameters should be considered while the genotypes are selected for exploiting yield in rainfed conditions.

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