Fig. 2
Path analysis model diagram showing causal relationships of measured traits of testcrosses involving early-maturing yellow S1 families derived from four cycles of selection and tester TZEI 23, evaluated across drought stress at Ikenne during the 2014/2015 and 2016/2017 dry seasons and Kadawa during the 2015 dry season in Nigeria. Bold values are residual effect; values in parenthesis are direct path coefficient and other values are correlation coefficients. R1 is the residual effects; ASI, anthesis–silking interval; DA, days to 50% anthesis; DS, days to 50% silking; EASP, ear aspect; EHT, ear height; EPP, ears per plant; EROT, ear rot; HC, husk cover; PASP, plant aspect; PLHT, plant height; STGR, stay green characteristic; RL, root lodging; SL, stalk lodging, and YIELD, grain yield