No abstract

U.P.) throughout Rabi, 2011-12, on sixty four genotypes with four checks varieties (Vardan, Ashirwad, Kranti, and Maya) in Augmented Block Design. Information obtained by this method helps in direct and indirect selection for genetic improvement of yield. Results revealed that the seed yield plant -1 showed extremely vital and positive correlational statistics with length of main flower cluster, secondary branches plant -1 , primary branches plant -1 , plant height and siliquae on main flower cluster whereas non-significant positive correlation with remaining characters. Path analysis disclosed that characters viz., seed yield exhibited the highest positive direct impact on length of main flower cluster followed by primary branches plant -1 , secondary branches plant -1 and plant height. Considering each, the correlation co-efficients and path co-efficients along, length of main flower cluster, number of primary & secondary branches plant -1 and plant height emerged as vital elements of seed yield which should be given due importance during indirect selection criteria.

Groundnut is sensitive to Fe deficiency under alkaline and calcareous soils and exhibits iron deficiency chlorosis (IDC) causing significant reduction in growth and yield. Genotypes were assessed for IDC related traits such as visual chlorosis rating, SPAD chlorophyll meter reading, chlorophyll and active iron (Fe2+) content across five growth stages and also for productivity traits viz., plant height, number of primary branches, number of pods per plant, pod yield, shelling per cent, 100 seed weight and haulm yield. Comparison between Fe-supplemented and Fe-nonsupplemented condition for IDC related traits showed not much difference among IDC tolerant genotypes across all five growth stages, while significant differences among IDC susceptible genotypes were observed. Maximum reduction in pod yield was observed among IDC susceptible genotypes compared to IDC tolerant and moderately tolerant genotypes. However, recently released variety G 2- 52 with moderate tolerance to IDC and higher yield potential recorded higher pod yield both under Fe applied (1754 kgha–1) and non-applied conditions (1544 kgha–1).