Early generation identification and utilization of potential inbred lines in modified single cross hybrids of maize (Zea mays L.).

摘要

The essential prerequisite for commercial production of single cross maize hybrids is the development of vigorous high yielding inbred parents. A modified form of Forward and Reverse Inbreeding Process was used to develop modified single cross hybrids. This method involves inbreeding using selfing in the early generations followed by plant-to-plant sibbing, early generation testing of lines, deriving sister lines, recombining sister lines and finally using sister line crosses to develop modified single cross hybrids. The improved performance of inbred lines thus derived and of experimental hybrids tested during winter of 1995-96 and 1996-97, and rainy season of 1996, at two diverse locations in Andhra Pradesh, India substantiates the effectivenessof this methodology. Inbred testers were used in test crossing and their utility in hybrid development is discussed.