Selection of Tolerant of Some Citrus Hybrids F1 to Calcareous Stress and Identification Sexuall Individuals by SSR Marker

The research was conducted during two seasons 2018-2019 and 2019-2020, at the Scientific Research Center in Lattakia-Syria, where cross between Sour orange, Cleopatra mandarin Trifoliate orange. first season (Sour orange ♂ × ♀) (Cleopatra sour (sour trifoliate ♀), crossing second (Trifoliate ♀). plants of generation F1 were exposed to calcareous stress according methods. one for a long term (two years) method grown plots containing 15% 35% Calcium Carbonate control free cross, short months) by watering with solution 1 mol 2 cross. indicators proline chlorophyll A, B T measured first-generation individuals, once beginning experiment time end study. Seven SSR primers used identify sexual five able individuals are CSM13, CSM17, CSM147, CSM18 TAA27, (mixture experiment) gave high values tolerant from they did not show deterioration chlorophyll, but rather increased values, hybrids sensitive this stress, showed significant Chlorophyll all seedlings, symptoms Lime-induced chlorosis appeared on more seedlings.