Fig 1.
Scheme of recurrent selection.
At the end of each cycle the progenies with higher yield and physiological attributes were selected as the base material for next cycle.
Table 1.
Mean, percentage genetic gain over mean, percentage gain over F5 and percentage gain over check HD3043 for biomass and chlorophyll content.
T (p) and T(c) are the T tests conducted to check the significance of difference between half sib families with base population and check HD3043 respectively for biomass and chlorophyll content.
Table 2.
Mean, percentage genetic gain over mean, percentage gain over F5 and percentage gain over check HD3043 for Canopy Temperature (CT) at vegetative stage and reproductive stage.
T (p) and T(c) are the T tests conducted to check the significance of difference between half sib families with base population and check HD3043 respectively for CT.
Table 3.
Mean, percentage genetic gain over mean, percentage gain over F5 and percentage gain over check HD3043 for HI and NDVI.
T (p) and T(c) are the T tests conducted to check the significance of difference between half sib families with base population and check HD3043 respectively for HI and NDVI.
Fig 2.
Distribution of yield in base as well as half-sib population.
‘A’ indicates base population; ‘B’ is the half-sib population while C to L are the individual families in the order hs26, hs35, hs48, hs65, hs68, hs79, hs86, hs91 and hs116. The lines in base/ half-sib/individual families are represented in Y-axis while the corresponding grain yield in grams is give in X-axis.
Table 4.
Range, mean,broad sense heritability(H(BS)), genetic advance (GA), percentage genetic gain over mean, percentage gain over F5 and percentage gain over check HD3043 for yield.
T (p) and T(c) are the T tests conducted to check the significance of difference between half sib families with base population and check HD3043 respectively for yield.
Fig 3.
Use of best linear unbiased predictions (BLUP) for selection of lines with high yield and drought tolerance.
The bars marked ‘green’ are the best performing lines 48x117 and 65 self. The bars marked ‘red’ are the check (HD 3046) and parent (HI 1500).
Table 5.
Dunnett’s tests comparing the performance of individual half-sib families against base population and check varieties (HD2987 and HD3043).
Table 6.
Comparison of drought tolerance of half-sib families, base population, checks (HD 2987 and HD 3043) and parents of the original cross (HI 1500 and HUW 510) on the basis of drought indices.
The indices used are TOL, GMP, MPI, MRP, REI and STI. The ranks for each index are also given. Y (RF) and Y (RI) indicate yield in grams obtained per plot from rainfed and restricted irrigation conditions.
Table 7.
Correlation between different drought adaptive traits and grain yield.
Traits used are biomass, Canopy Temperature (at vegetative and reproductive stages), HI,NDVI and chlorophyll content. The highlighted values indicate significant correlation at 5% level.