Pistachio (Pistacia vera L.) is a dioecious plant in which male cultivars that flower synchronously with the female are required for nut production. ‘Tejon’ is a new male pistachio whose pollen is shed early, overlapping the time of female receptivity of ‘Gumdrop’. It produces much pollen from many flowers, and the pollen shows good viability. ‘Tejon’, like ‘Gumdrop’, is precocious, producing flowers beginning in the fourth or fifth leaf. Early season flowering and fruiting pistachio cultivars are being developed through the University of California pistachio breeding program to provide early nut harvest and improve access to processing facilities. ‘Gumdrop’ (Kallsen and Parfitt, 2017a) is at full bloom about 6 d before ‘Golden Hills’ (Parfitt et al., 2007) female and the male pollenizer ‘Randy’ (Parfitt et al., 2010), the earliest commercial pollenizer. ‘Tejon’ was selected for flowering period overlap with ‘Gumdrop’ based on its high level of pollen production from many flowers and good pollen viability.
Beede, B., Ferguson, L., Beinhorn, K., Thompson, T., Driever, G. & Michailides, T.J. 2006 Comparison of three chill-hour accumulation methods for monitoring rest in pistachio: Final progress report. California Pistachio Industry – Annual Report Year 2005-2006. California Pistachio Commission, Fresno, CA
Chao, C.T., Parfitt, D.E., Ferguson, L., Kallsen, C.E. & Maranto, J. 1998 Breeding and genetics of pistachio: The California program. Proc. 2nd Int. Symposium on Pistachios and Almonds, Aug. 24-29, 1997, Davis CA, USA Acta Hort. 470 152 161
Kallsen, C.E. 2017 Temperature-related variables associated with yield of ‘Kerman’ pistachio in the San Joaquin Valley of California HortScience 52 598 605
Kallsen, C.E. & Parfitt, D.E. 2018 Male pistachio tree named ‘Tejon’. US PP28,931
Luedeling, E., Zhang, M. & Girvetz, E.H. 2009 Climatic changes lead to declining winter chill for fruit and nut trees in California during 1950–2099 PLoS One 4 E6166, doi: 10.1371/journal.pone.0006166
Minitab Inc. 2016. Minitab® 17.3.1. ©2013. <http://www.minitab.com/en-us/>.
Royal Horticultural Society 1966 RHS. colour chart v. 1–4. QC495 R8 V.1– 4