تحديد الأبناء الهجن F1 الناتجة من عدة تهجينات لأصول الحمضيات المتحملة لإجهاد البرودة الشديد باستخدام SSR

الملخص EN

The study was carried out at the Agricultural Scientific Research Center in Lattakia, Syria, during (2018-2019) and (2019-2020), after obtaining F1 seedlings resulting from different crosses between the following citrus rootstocks: sour orange.

, Cleopatra mandarin.

and the trifoliate orange.

The individuals were selected according to the characteristic of the formal leaf, and then selected individuals were subjected to shilling stress, that is one of the determinants of citrus cultivation in Syria by placing the one-year-old individuals in controlled freezers.

The results shows that the percentage of damage in the leaves of the tri-leaf orange hybrids did not exceed 32% , while Cleopatra tangerine hybrid it ranged between 0% and 58% , and in the sour orange hybrids between 6% and 16% .

Within 24 hours of applying stress and 11 individuals were selected from the F1 tolerant to the stress of cold shilling (10-)°C and (0)°C for 24 hours, the hybrids continued to grow normally the following spring, Since the citrus seeds are polyembryonic and give nucellular embryos; its genotype similar to the seed parent, the objective of moleculare markers SSR is identification tolerant hybrids.

Whereas, .

as a result, four primeres were able to effectively identify hybrids, that showing difference with seed parent; and all the individuals were hybrids.

Corresponding author: E-mail(venushasan80@gmail.

com) Al-Muthanna University All rights reserved