Determination of the apomictic fruit set ratio in some Turkish walnut (Juglans regia L.) genotypes

ŞAN B., DUMANOĞLU H.

Turkish Journal of Agriculture and Forestry, vol.30, no.3, pp.189-193, 2006 (Scopus, TRDizin) identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 3
  • Publication Date: 2006
  • Doi Number: 10.3906/tar-0502-10
  • Journal Name: Turkish Journal of Agriculture and Forestry
  • Journal Indexes: Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.189-193
  • Keywords: Apomixis, Juglans regia L., Walnut
  • Isparta University of Applied Sciences Affiliated: No

Abstract

This study was carried out to determine the amount of apomictic fruit set in 10 Turkish walnut (Juglans regia L.) genotypes in 2001, 2002 and 2003. Yalova-1, Şebin, Bilecik, KR-1, KR-2, Şen-2, 07-KOR-1, Tokat-1, Kaman-1 and Kaman-5 cultivars and selections were used in the experiment. Female flowers were bagged and/or pollinated with pollen of the apple cv. 'Golden Delicious' (Malus x domestica Borkh.), and the apomictic fruit set was determined 8 weeks after anthesis. The percentage of apomictic fruit set without pollination ranged from 0.5% to 1.6% in 5 walnut genotypes, namely Yalova-1, Bilecik, 07-KOR-1, Tokat-1 and Kaman-1, in the first 2 years. In the third year, the highest apomictic fruit set (6.4%) was obtained from Tokat-1 after pollination with apple pollen. Apple pollen did not induce apomixis in the other 4 genotypes. The results indicated that apomictic fruit set is insufficient for economical seed and crop production in these ten Turkish walnut genotypes. © TÜBITAK.