Combining Ability and Heterosis Studies in Maize (Zea mays L.) under Kharif Season

Study of Heterosis for Grain Yield and its Components Traits in Single Cross Derivatives of Maize (Zea mays L.)

“…In the current study, for yield and yield contributing traits, the number of hybrids showing significant positive heterobeltiosis and relative heterosis on pooled basis were 38 and 40 respectively, for grain yield per plant. Results observed by Chaurasia et al (2020) are also in support with the present experimental findings for significant positive heterobeltiosis and relative heterosis on pooled basis for grain yield per plant. For agromorphological traits, heterobeltiosis and relative heterosis on pooled basis, all hybrids in case of plant height and 43 (heterobeltiosis) and all hybrids (relative heterosis) for ear height, 15 and 22 (for ear length), 24 and 36 (for ear girth) and 27 and 33 (for no.…”

“…This hybrid also exhibited negative significant economic heterosis for days to 50% tasseling (-2.25%) that suggested earliness for maturity. Similar results were found by Adebayo et.al., (2017), Chaurasia et al, (2020), and Iseghohi et al, (2020) In case of maturity traits, as earliness is desirable trait the significant negative economic heterosis exhibited by L 4 ×T 2 (-2.39%) for days to 50 percent tasseling, L 3 ×T 1 (-40.00 %) for ASI and L 13 ×T 1 (-7.26 %) for days to 75 per cent brown husk on pooled basis. For the maturity traits earlier workers also reported significant negative economic heterosis viz., Praveen Kumar et al (2014), Attia et al (2015) for early tasseling and silking, Matin et al (2017), Chaurasia et al (2020) for (Anthesis-silking Interval).…”

“…The above stated statements are in agreement with results reported by researchers viz., Bisen et al (2017), Adebayo et al (2017) and Chaurasia et al (2020) for grain yield and yield contributing traits and maturity related traits in maize. Similar findings for mid parent heterosis for physiological and quality traits in maize were also reported by Tesfaye et al (2019); Chaurasia et al (2020) and Iseghohi et al (2020).…”