تقدير بعض المعايير الإحصائية لأهم الصفات الكمية ودورها في التحسين الوراثي للذرة الرفيعة Sorghum bicolore L. تحت ظروف السماد الحيوي

Abstract EN

This study was carried out in order to determine genetic parameters for a number of sorghum genotypes under the impact of bio fertilizer (potash) and the most affected traits by the genetic factor compared to the environmental factor for establishing a successful and rapid program to improve the quantity traits of the crop.

Six treatments of bio fertilizer in addition to mineral fertilizer and six genotypes, were planted 14/7/2017 at Field Crops Research Station- College of Agriculture- University of Tikrit using randomized complete block design in three replicates within split plots.

Main plots were fertilizer levels and genotypes were in sub-plots.

Number of days to flowering, leaf area, plant height, number of grains per ear, 1000 grain weight and single plant yield were studied.

Results showed a genetic variation had more contribution than environmental variation for all fertilizer levels and their traits which was reflected on heritability.

In addition, genetic, environmental and phenotype coefficient of variation and predicted genetic improvement as a percentage were intermediate for the most traits.

A kind of a significant genetic correlation in the desired direction among yield, number of days to flowering and 1000 grain weight was recorded at the second level.

However, among number of days to flowering, plant height and number of grains per ear was recorded at the fourth level, but at the fifth level was among number of days to flowering, leaf area and plant height.

Finally, a correlation between plant height and number of grains per ear at the sixth level was recorded