Effect of Pollen Source on Hybrid Embryo Length and Embryo Rescue of Some Early-Ripening Peach Cultivars
This investigation was carried out during the two successive seasons of 2014 and 2015 on two early ripening peach cultivars, namely Flordastar and EarliGrande used as seed parents to introduce new early ripening peach genotypes through intraspecific hybridization with Flordastar, Flordaprince, EarliGrande, Earlyswelling, Swelling and MitGhamr as pollinators. The effect of pollen source on hybrid embryo length and their effect on embryo germination and plantlet formation percentages have been investigated. Results showed that when Flordastar and EarliGrande were pollinated with MitGhamr or Swelling, relatively larger embryos and percent fill (PF ) were resulted in comparison with other parent pollen cultivars. Moreover, the excision age of 1 Flordastar and EarliGrande hybrid embryos, for embryo rescue, was more effective within 9 and 10 WAP which recorded the highest germination and plantlet formation percentages.