PJB-2006-133
BREEDING POTENTIAL FOR HIGH TEMPERATURE TOLERANCE IN CORN (ZEA MAYS L.)
TASSAWAR HUSSAIN, IFTIKHAR AHMAD KHAN, MUHAMMAD ASGHAR MALIK* AND ZULFIQAR ALI
Abstract
Rising temperature reduces the pollen viability and silk receptivity of corn resulting in poor seed set and reduced yield. Continuously rising temperature and less frequency and distribution of rainfall coupled with usual canal-closure particularly in Pakistan have significantly been reducing the grain yield. This problem could be overcome by developing heat tolerant maize hybrids. For this purpose, five heat tolerant (lines), five heat susceptible (lines) and four heat susceptible (testers) corn inbred lines were hybridized artificially in a line x tester mating design. The 40 hybrids and 14 parents were evaluated for heat tolerance under high temperature field conditions by sowing on March 31 using triplicated randomized complete block design during spring 2004. Highly significant differences (P=0.01) were observed among 54 corn genotypes
To Cite this article:
Download
