Breeding
hybrids and inbreds for temperature tolerance in maize
VP Mani, RS
Khandelwal, GS Bist, KS Koranga
Vivekananda
Parvatiya Krishi Anusandhan Sansthan (ICAR), Almora 263601, Uttaranchal
Received: 15 March 2016 Revised Accepted: 10 April 2016
ABSTRACT
The
important breeding objective in any crop plants is to improve grain yield
potential and stability of the cultivars including in maize. Stability of
performance becomes more important if crop is grown in less favorable
environments. Tolerance to abiotic stresses is in general and drought through
cold and heat tolerance in particular is essential in crop plants, as plant cannot
alter an environmental stress external to itself. The effect and mechanism of
all the three types of temperature stresses vary with respect to survival,
growth and development and physiological processes. So during planning of crop improvement in
open pollinated crops like maize for temperature tolerance through development
of inbred and hybrids one must keep in mind regarding mechanism of temperature
tolerance. The improvements in
vegetative growth and yield performance of any of these crops will require
selection of inbreds for hybrid development that have more efficient growth
habits under unfavourable stresses conditions.
Key Words: Drought,
Hybrids, Inbreds, Maize, Resistance, Tolerance