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Correlation Between True Seed and Tuber Dormancy in a Solanum Tuberosum Group Phureja × Stenotomum Population

Date: August 30,2019 |Hits: 2120 Download PDF How to cite this paper

Muhammad W. Haider 1,*, Kathleen G. Haynes 2, Chaudhry M. Ayyub 1, Habat U. Asad 1, Naveed Ur Rehman 1, Mahmood Ul Hasan 1

1 Institute of Horticultural Sciences, University of Agriculture, Faisalabad, 38040, Pakistan.

2 USDA-ARS, Genetic improvement of Fruits and Vegetables Laboratory, Beltsville, MD 20705, USA.

*Corresponding author: Muhammad WASIM HAIDER, Email: m.wasim.haider@uaf.edu.pk


Short tuber dormancy is desirable when multiple cropping seasons occur yearly, yet most potato cultivars were developed for regions with one growing season per year and have long dormancy.  Although several methods exist for breaking tuber dormancy, they can lead to uneven emergence and poor stand counts. Breeding short dormancy cultivars could alleviate this problem. A long-day adapted diploid hybrid population of S. tuberosum Group phureja- S. stenotomum (phu-stn) has been developed with short tuber dormancy. The purpose of this study was to determine if there was a correlation between tuber dormancy in these phu-stn parents and true potato seed dormancy in their offspring, which would allow rapid breeding of short-dormancy germplasm. Tuber dormancy was evaluated for 12 diploid phu-stn parents harvested from three different locations: Presque Isle, Maine (ME), Plymouth, North Carolina (NC) and Beltsville, Maryland (MD) and stored at 7 °C in MD. Twelve crosses were made among these parents. Each parent was represented twice in the offspring.  True potato seed (TPS) from these 12 families were disinfected and soaked in water for 24 hours, dried, and sown in tissue culture. TPS germination was recorded daily for 35 days and the germinated proportion was calculated. The experiment was conducted three times. Parental tuber dormancy ranged from 6-10+ weeks and varied significantly among locations. TPS family proportion germination ranged from 9 to 99%. There was no correlation (r = 0.01) between parental tuber dormancy and seedling vigor index. These results show that the relationship between offspring TPS dormancy and their parent’s tuber dormancy is unpredictable. Additional research is needed to determine if selection for early sprouting in the offspring in vitro is correlated with short tuber dormancy in subsequent field generations of these offspring.


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How to cite this paper

Correlation Between True Seed and Tuber Dormancy in a Solanum Tuberosum Group Phureja × Stenotomum Population

How to cite this paper: HAIDER, M. W., HAYNES, K. G., AYYUB, C. M., ASAD, H. U., REHMAN, N. U., HASAN, M. U. (2019) Correlation between true seed and tuber dormancy in a solanum tuberosum group phureja × stenotomum population. International Journal of Food Science and Agriculture, 3(3), 180-187.

DOI: http://dx.doi.org/10.26855/ijfsa.2019.09.006

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