التفاعل الوراثي البيئي و تحليل الثباتية لبعض الصفات الإنتاجية و النوعية في أربعة أصناف من الشوندر السكري (Beta vulgaris L.)‎

Abstract EN

The field experiment was carried out at the General Commission for Scientific Agricultural Research (GCSAR), Homs Res.

Station during 2007/2008 and 2008/2009 seasons, to determine genotype X environment interaction and stability analysis (Ysi) for some yield and quality traits of four sugar beet varieties, two were monogerm i.e.

Parade and Etna, while the other were multigerm i.e.

Nadir and Mammut.

The experiment was sown in three dates i.e.

15/9, 1/10, and 15/10, with three plant densities (75000, 100000, and 125000 plant per hec).

A split split plot design with RCBD was used, with three replicates.

The results of the combined analysis showed significant effect of the varieties (V), sowing dates(S) and plant densities (D) for the studied traits.

Comparison of means using LSD 0.05 test clarified that Etna variety was superior as compared to the other varieties with respect of root yield (65.33 ton.hec-1), sugar yield (8.66 ton.hec-1), and sucrose percent was (16.66%).

The results also showed that the early sowing date (15/9) caused a decrement in root and sugar yields 8.6, and 35.41%, respectively.

The highest root and sugar yields (60.27, 11.86 ton.hec-1), respectively were achieved in the date of sowing (15/10), while the higher sucrose percent was (17.39%) in the date of sowing (1/10).

The results also showed that the highest root and sugar yields (71.10, 19.02 ton.h-1), respectively, and sucrose percent (16.82 %) were detected when the plant were sown with a density (20 X 50 cm).

The stability analysis indicated that Parade variety was the most stable variety to be sown in Homs governorate, Autumn sowing in Syria.