استجابة تركيبين وراثيين من الذرة الصفراء (Zea mays L.)‎ لتراكيز و مواعيد أضافة الجبريلين و تأثرهما في الحاصل و مكوناته

الملخص EN

field experiment was carried out during the autumn season of 2016 at a private farm in the area of AL-Tajia 6 kmsouth of Babylon province center to study the response of two maize genotypes to varous Levels, and application time of GA3 and their effect on yield and its components; afactorial experiment (2*2*4) within Randomized Complete Block Desin (RCBD) with three replication was used; two genotypes (furates and 6120), two times of application stages (8 and 10 leaves) ,and four levels of GA3 (0 , 50 , 100 , and 200mg/L).

The genotypes were differ in most traits studied ,Furates was superior in number of grain comb and biological yield (482.8 grain.comb-1) and (18.926 t.ha-1)respectively, but 6120 gave the highest rate of number of rows per ear (15.59 rows.ear) .The appalication time of GA3 were differ in most traits studied,The first adding time was suprior in length of the ear (cm), number of grains per row , per row, biological yield (t.ha-1), and total grain yield (t.

ha-1) with rates of 17.30 cm , 36.67 grain.row-1, 490.4 grain.ear, 18.002 t.ha-1 , 8.612 t.ha-1 respectively .

The levels of GA3 were differ in most studied of the traits .

The high concout ration of GA3 (200 gm/L)gave the highest number of rows per ear ,number of grian per row and ,the weight of 300 grains (weight) compared to the other conterol treatments which were 15.78 row.

ear-1 , 38.69 grain.

Rows, 105.19 g respectively.