Superior Growth Characteristics, Yield, and Fruit Quality in Promising European Pear (Pyrus communis L.) Chance Seedlings in Iran

Authors
R. Najafzadeh
K. Arzani
Department of Horticultural Sciences, Faculty of Agriculture, Tarbiat Modares University, Tehran, Islamic Republic of Iran.
Abstract
Selection of superior chance seedling genotypes is an important task in pear breeding programs. This research was carried out in order to explore and evaluate some of European pear (Pyrus communis L.) chance seedling genotypes that are primarily used as rootstock for the Asian pear (Pyrus serotina Rehd.) in Tarbiat Modares University (TMU) Asian Pear Collection Orchard. After four years visual observations of the genotypes, the evaluation process started on the pre-selected genotypes in order to identify the superior promising individuals during 2009 and 2010 growing seasons. Selected chance seedling genotypes were A95, A101, A189, A195, and A374. A local commercial cultivar `Shahmiveh’ was used as a reference and labeled as A238 in the evaluation program database. Results showed significant differences among the studied genotypes in most of the evaluated characters. Among the studied genotypes, genotype A95 showed indications of appropriate fruit physicochemical properties and higher fruit quality compared with the reference cultivar. Good fruit aroma as well as a reddish background skin color, highest acidity and lowest pH among the examined genotypes were other superior characters of A95. Based on the measured characters compared with `Shahmiveh' as a good reference commercial Iranian pear cultivar, we conclude that A95 showed superiority and higher rank in flavor, fruit color, and attractiveness. Also, this promising genotype showed a good productivity potential in terms of producing higher yield with a suitable supporting vigor. Further research on the standard rootstocks within the TMU pear breeding program will continue in the framework of final new cultivar release program.

Keywords

1. Arzani, K. 1994. Horticultural and Physiological Aspects of Vigor Control in Apricot (Prunus armeniaca L.) under Orchard and Controlled Environment Conditions. PhD Diss., Dept. of Plant Sci., Massey Univ., Palmerston North, New Zealand.
2. Arzani, K. 2003. A Perspective on the Importance of Preservation, Maintenance, Improvement and Management of Iranian Traditional Orchards. In Proceedings of the 1st National Iranian Traditional Orchards Conference, 3rd of June, Qazvin, Iran, PP. 1-5. (in Persian)
3. Arzani, K. 2004. The Effect of European Pear (Pyrus communis L) and Quince (Cydonia oblonga L.) Seedling Rootstocks on Growth and Performance of Some Asian Pear (Pyrus serotina Rhed) Cultivars. Acta Hort., 658: 93-97.
4. Arzani, K. 2005. Progress in the National Asian Pear Project: A Study on the Adaptation of Some Asian Pear Cultivar to Iranian Environmental Conditions. Acta Hort., 671: 209-212.
5. Arzani, K. 2008. Introduction, Propagation, Quarantine Evaluation and Onset of Some Asian Pear Cultivars (Pyrus serotina Rehd.) Compatibility Evaluation under Iran Environmental Conditions. Phase 1. "Introduction and Propagation of Germplasm". Final Report on the National Asian Pear Project at Tarbiat Modares University (TMU), Project No. 4225 with the Support of National Research Council of Iran (NRCI). 140 PP.
6. Arzani, K. 2014. Introduction, Propagation, Quarantine Evaluation and Onset of Some Asian Pear Cultivars (Pyrus Serotina Rhed.) Compatibility Evaluation under Iran Environmental Conditions. Phase 2. "Compatibility Evaluations under Different Set of Environmental Conditions". Final Report on the National Asian Pear Project at Tarbiat Modares University (TMU), Project No. 84006 with the Support of National Science Foundation Organization (INSF ORG) of Iran.
7. Arzani, K. and Roosta, H. R. 2004. Effects of Paclobutrazol on Vegetative and Reproductive Growth and Leaf Mineral Content of Mature Apricot (Prunus armeniaca L.) Trees. J. Agric. Sci. Technol., 6: 43-55.
8. Arzani, K., Khoshghalb, H., Malakouti, M. J. and Barzegar, M. 2008. Postharvest Physicochemical Changes and Properties of Asian (Pyrus serotina Rehd.) and European (Pyrus communis L.) Pear Cultivars. Hort. Environ. Biotechnol., 49(4): 244-252.
9. Arzani, K., Bahadori, F. and Piri, S. 2009. Paclobutrazol Reduces Vegetative Growth and Enhances Flowering and Fruiting of Mature ‘J. H. Hale’ and ‘Red Skin’ Peach Trees. Hort. Environ. Biotechnol., 50(2): 84-93.
10. Bell, R. L. 1990. Pears (Pyrus). In: "Genetic Resources of Temperate Fruit and Nut Crops", (Eds.): Moore J. N. and Ballington, J. R.. Int. Soc. Hort. Sci., Wageningen, the Netherland, PP. 665-697.
11. Bell, R. L. and Hough, L. F. 1986. Interspecific Hybridization of Pyrus. HortSci., 21: 62- 64.
12. Bell, R. L., Quamme, H. A., Layne, R. E. C. and Skirvin, R. M. 1996. Pears. In: "Tree and Tropical Fruits, Fruit Breeding", (Eds.): Janick, J. and Moore, J. N.. John Wiley and Sons, Inc., NY, USA, PP. 441–514.
13. Challice, J. S. and Westwood, M. N. 1973. Numerical Taxonomic Studies of the Genus Pyrus Using Both Chemical and Botanical Characters. Bot. J. Linnean Soc., 67: 121-148.
14. Chen, P. M. and Mellenthin, W. M. 1981. Effect of Harvest Date on Ripening Capacity and Postharvest Life of Anjou Pears. J. Amer. Soc. Hort. Sci., 106: 38-42.
15. Chen, J., Wang, Z., Wu, J., Wang, Q. and Hu, X. 2007. Chemical Compositional Characterization of Eight Pear Cultivars Grown in China. Food Chem., 104: 268-275.
16. Elshihy, O. M., Sharaf, A. N. and Muzher, B. M. 2004. Morphological, Anatomical and Biochemical Characterization of Syrian Pear (Pyrus syriaca Boiss) Genotypes. Arab. J. Biotech., 7(2): 209-218.
17. Emamie, A. 1996. Methods of Plant Analysis. Organization for Research and Agricultural Extension and Education, Ministry of Agriculture, 1: 128. (in Persian)
18. Ferrer, A., Remon, S., Negueruela, A. I. and Oria, R. 2005. Changes during the Ripening of the Very Late Season Spanish Peach Cultivar Calanda. Feasibility of Using CIELAB Coordinates as Maturity Indices. Sci. Hort., 105: 435–446.
19. Hrotko, K., Magyar, L. and Gyeviki, M. 2008. Evaluation of Native Hybrids of Prunus fruticosa Pall. as Cherry Interstocks. Acta Agri Serbica., 13: 41–45.
20. Iezzoni, A. F, Schmidt, H. and Albertini, A. 1991. Cherries, Genetic Resources of Temperate Fruit and Nut Crops. Acta Hort., 1: 109-175.
21. Karadeniz, T. and Sen, S. M. 1990. Morphological and Pomological Properties of Pears Grown in Tirebolu and Vicinity. J. YYU Agric. Fac., 1: 152-165.
22. Katayama, H. and Uematsu, C. H. 2006. Pear (Pyrus Species) Genetic Resources in Iwate, Japan. Genet. Resour. Crop Evol., 53: 483–498.
23. Kawamura, T. 2000. Relationship between Skin Color and Maturity of Japanase Pear "Housui". Jap. Farm Work Res., 35: 33-38.
24. Khatamsaz, M. 1992. Rosacea Family: Flora of Iran. First Edition, Iranian Research Organization of Forests and Pastures, Tehran, Iran, 352 PP. (in Persian)
25. Krause, S., Hammer, K. and Buerkert, A. 2007. Morphological Biodiversity and Local Use of the Himalayan Pear (Pyrus pashia) in Central Bhutan. Genet. Resour. Crop Evol., 54: 1245-1254.
26. Lane, W. D. 1979. Regeneration of Pear Plants from Shoot Meristem–tip. Plant Sci. Lett., 16: 337-342.
27. Loreti, F., Massai, R., Fei, C. and Cinelli, F. 2000. Performance of Conference Cultivar Several Quince and Pear Rootstocks. Proceedings of the 8th Symposium on Pear, 4-9 September, Bologna, Italy, 89 PP.
28. Magyar, L. and Hrotko, K. 2008. Prunus cerasus and Prunus fruticosa as Interstocks for Sweet Cherry Trees. Acta Hort., 795: 287–292.
29. Ozturk, I., Ercisli, S., Kalkan, F. and Demir, B. 2009. Some Chemical and Physico-mechanical Properties of Pear Cultivars. AJB, 8(4): 687-693.
30. Paganova, V. 2009. The Occurrence and Morphological Characteristics of the Wild Pear Lower Taxa in Slovakia. Hort. Sci (Prague)., 36(1): 1-13.
31. Sharifani, M., Hemmati, K., Hassani, S. and Fallahi, E. 2006. Evaluation of Useful Botanical Traits for Iranian Pyrus Species. Acta Hort., p 769.
32. Wertheim, S. J. 2000. Rootstocks for European Pear: A Review. Proceedings of the 8th International Symposium on Pear, 4-9 September, Bologna, Italy, 87 PP.
Journal of Agricultural Science and Technology
Volume 17, Issue 2
March and April 2015
Pages 427-442