Investigations on determination of walnut (Juglans regia l.) genotypes not affected by spring late frosts in Bolu in 2016

This research was carried out on April 21-22, 2016 in order to determine walnut genotypes unaffected by agricultural sprouts in Bolu. In the study, 41 genotypes were determined among the approximately 12 thousand walnut trees growing in central districts and villages of Bolu province and studies were carried out on these genotypes. In genotypes, it was determined that the total outflow rate was 91.22% on average, robust internal rate 98.05%, internal shrinkage 18.78%, outer shell 68.29% flat, 65.85% easy breakage of shell, and 60.98% yellow color. The fruit weights were determined to be 7.8 g to 14.3 g, internal weight 3.6 g to 7.0 g, yield 35.80% to 62.70%, total fat 47.67% to 69.98%, total protein 9.98% to 17.56% in the genotypes. 10 genotyped fruit weights 10.6 g and 14.3 g, internal weight 5.0 g and 7.0 g, internal ratio 47.17 to 55.03%, crustal thickness 1.08 to 1.71 mm, fruit width 28.31 to 33.79 mm, fruit size 29.07 to 34.68 mm, fruit height 32.18 to 39.58 mm, fruit shape index 0.85 to 0.98 total fat content 48.90% to 69.60% and protein content 11.23 to 16.29%.