الفهرس 
Evaluation of F1 hybrid trees between leconte pear and some other pear cultivars
Arabic title pageOnly 14 pages are availabe for public view
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Abstract
Production of new low chilling requirements genotypes is one of the most important objectives in pear breeding program to suit warm Egyptian climate conditions. Evaluation of chilling requirement of pear cultivars parents and seedlinges of Fi hybrids were estimated after 200, 300, 400, and 500 chilling hours at 7.2{u00B0}C. Cultivars used as parents (LeConte, Hood and YaLi) were varied in chilling requirement. Hood had the lowest number of chilling hours below 200 chilling hours to bud break, LeConte below 500 chilling hours while, YaLi failed to break bud at 500 chilling hours. F1 hybrids LeConte x Hood (LH) and F1 hybrids LeConte x YaLi (LY) were varied in chilling hours according to its male parent