Vol. 12, Issue 12 (2023)

Author(s):
N Tejaswini, K Sukumar, T Srikanth and B Mallaiah

Abstract:
Heterosis studies in maize revealed that eighteen out of hybrids recorded significantly negative heterosis over better parent for days to 50% flowering. Nine hybrids showed significantly negative heterosis over better parent for days to silking and anthesis silking interval. Twenty five hybrids recorded significantly negative standard heterosis for days to maturity. Ten hybrids recorded significantly positive Standard heterosis while, ten hybrids recorded significantly negative standard heterosis for plant height. For ear girth, better-parent heterosis ranged from -21.18% (PFSR-73×PFSR-127) to 17.95% (BML-10×ML-14). Better-parent heterosis for number of kernel rows per ear ranged from -27.61% (MGC-49×BPDT-5009) to 16.67% (ML-14×PFSR-92). Five hybrids recorded significantly positive heterosis over the better parent for the trait. Better-parent heterosis for number of kernels per row varied from -39.60% (ML-14×BPDT-5009) to 50.70% (PFSR-73×PFSR-92) for number of kernels per row. Better-parent heterosis for grain yield per plant ranged from -55.52% (MGC-49×BPDT-5009) to 44.65% (PFSR-73×ML-14).