Estimating the breeding value of some pomological traits in grape cultivars of West Azarbaijan using ISSR markers

In a breeding program, it is important to know gene action, because knowledge in this field helps the researchers in their crossing programs and effective selection. In this study, breeding values of 14 traits (TSS, pH, TA, berry weight, flesh weight, single seed weight, seed number, juice content, pollen germination, cluster length, cluster width, cluster weight, fruit set in open and under controlled pollination) in 45 grape cultivars from West Azerbaijan were predicted using the best linear unbiased prediction (BLUP) procedure. Considering the sum of ranks of the breeding values ​​of all the studied traits, Agh Shani, Qara Shani, Lal Qermez, Angotka, Qzl Ouzum, Taifi, Tabarze Qermez and Sahebi Qermez cultivars had the highest rank. Among the studied seedless cultivars, Rejin in terms of single seed weight and Keshmeshi Sefid in terms of seed number had the highest breeding values. Among the seeded cultivars, Shirazi in terms of single seed weight and Chava-Ga in terms of seed number had the highest breeding values. Taifi, Sahebi Qermez, Sarghola, Chava Ga, Gazandaii and Qzl Ouzum cultivars with high and positive breeding values for berry weight, flesh weight and juice content can be used as a good parent for breeding of these traits in crossing programs because they can better transfer their characteristics to their offspring. At-Ouzum, Rishbaba Qermez, Shahroudi, Sahebi Qermez, Tabarze Qermez, Dastarchin, Lal Qermez, Alhaghi, Agh Shani and Angotka cultivars had positive and high breeding values for cluster length, cluster width and cluster weight traits, so they can be introduced as suitable parents for breeding of these traits in breeding programs.