Efficiency of Gamma Ray to Induce Genetic Diversity in Potato

Ahmad Ziaei¹, Ahmad Mousapour Gorji^2* and Davoud Hassanpanah³

¹Department of Agronomy and Plant Breeding, College of Agricultural, Eslamshahr Branch, Islamic Azad University, Eslamshahr, Iran.

²Vegetable Research Department, Seed and Plant Improvement Institute (SPII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.

³Horticulture Crops Research Department, Ardabil Agricultural and Natural Resources Research Centre, AREEO, Ardabil, Iran.

DOI : http://dx.doi.org/10.13005/bbra/2371

ABSTRACT: To study on irradiation yield, two cultivars, Kennebec and Banba, were irradiated with different gamma doses. One hundred and eight suitable genotypes were selected and they were cultivated in four replications as yield primary test (augmented). Twenty seven different genotypes -in any iteration- along with five commercial varieties (Agria, Kennebec, Banba, Marfona, and Caesar) were cultivated. The meancomparison results fortuber’s dry mattershowed that clones B20-20, B20-11, and B20-101 in Banba populationhave 10% advantage more than their primary parents, and about Kennebec population this advantage reaches to more than 5% for clones K25-7, K20-21, and K20-27. The maximum of increasing and decreasing in the tuber’s flesh color forBanba population was 25% and 43.5% for clones B20-11 and B20-114 respectively. About Kennebec population this color change was remarkable in clones K20-16, K20-45, and K20-30 (49.2%, 35.2%, and 18.3% respectively). The range of yield change was between 0.04% to 56.7%, in positive side, and 0.05% to 66.2% in negative side. In comparison to their parents,the clones B20-24, B20-122, B20-44, and B20-76 in Banba population, and the clones K20-67, K20-70, K20-71, K20-28, K20-26, K20-30, and K20-47 in Kennebec population had better yield. The results from cluster analysis and coefficient of variations revealed that degree of diversity wasn’t considerable among studied population. The different gamma doses had different effects on the varieties of potato,and traits including specific gravity, height, and tuber’s dry mattershowed least changes but yield and its components presented the greatest variations. It seems that generally irradiation has more negative effect on potato’s traits and it is less successful in improvement of traits regarding the potatovariety.

KEYWORDS: Potato; Qualitative and Quantitative Traits; Irradiation; Diversity

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