The Genetic Variation and Correlation Analysis of Quantitative Characters and Breeding Selection in Sunflower

To study the genetic variation of sunflowers quantitative characters and find correlation with each other,and guide the choice of sunflower germplasm resources and varieties,the experiment used 207 materials,and used NCⅡdesign and random block method.The trial studied the average,standard deviation,range,coefficient of variation,narrow sense heritability,broad sense heritability of characters containing plant height,head diameter,head seed number,head seed weight,100-seed weight,oil content in seed and their correlation.The result indicated that there was a large variation and wide selection could be done in sunflower quantitative characters.The heritability of oil content was the highest,heritability of 100-seed weight and kernel ratio in seed was moderate,heritability of plant height and head diameter was smaller,heritability of head seed weight was the least.There were significantly positive correlation between the head seed weight and plant height,head seed weight and 100-seed weight,head seed weight and head diameter,oil content in seed and oil content in kernel,oil content in seed and kernel ratio in seed,hull ratio in seed and 100-seed weight,hull ratio in seed and empty seed ratio in head,plant height and 100-seed weight,head seed number and head diameter,respectively.There were significantly negative correlation between oil content in seed and hull ratio in seed,hull ratio in seed and kernel ratio in seed,100-seed weight and kernel ratio in seed.