بررسی آزمون‌های سرما و پیری تسریع شده بر روی برخی صفات اینبرد لاین‌های والدینی ذرت سینگل کراس 704

In order to evaluate the seed vigor of corn inbred parental single cross 704, Research was conducted in 1390 in Central Laboratory of the seed and plant certification and registration institute in Karaj. Laboratory tests of cold and accelerated aging as factorial in completely randomized design with three levels of viability, 93%, 90% and 87% and 3 lines of inbred parents of corn hybrids 704 includes MO17 (parent), B73cms (female parent) and B73rfc (female parent) with four replications. According to the above results, the rate of decline in the percentage of normal seedlings to cold test than accelerated aging was associated with a greater reduction. But mean time of germination in accelerated aging test, according to the saturated moisture faster than cold test before planting. According to studies conducted, B73cms the female parent was more resistant to cold stress and aging. In addition, Evidences indicate that the viability is higher; the rate of decline will be lower seed vigor.