فعالية حبوب اللقاح للذرة الصفراء بتأثير مدة الخزن تحت الظروف الحقلية

الملخص EN

A field experiment was carried out in the experimental field of the Crop Dep.- College of Agriculture-Abu Ghraib for two seasons, autumn 2010 and spring 2011 to study the viability of pollen grains for some genotypes of maize under field conditions.

The study included two variables, the first one was storage periods and the second was genotypes of maize which consist of Inbred (H.S.), synthetic variety and pop corn genotype in the spring season, while a hybrid was added to the study in the autumn season.

Randomized Complete Block Design with three replicates was used in split-plots arrangement.

The genotypes occupied main plots while storage periods (0, 1 / 2, 1, 2 and 4 hours) were distributed to the sub-plots.

Pollen grains were collected at flowering stage, after 2-4 days of tasselling, and then stored at field condition.

The silks were pollinated by the stored pollen.

The results showed decreasing of fertility and grain number with increase of storage periods especially in the spring season.

The effect of storage periods 0 and 0.5 hour was similar on the grain number in the autumn season, while direct pollination had produced the highest number of grains in the spring season.

Also, the results showed that pollen grains can survives for four hours when be stored under field conditions despite decreasing the effectiveness as time progresses.