Wepster Hazelnut Cultivar Eastern Filbert Blight Resistance
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Solution Overview
Problem
Current hazelnut cultivars lack robust resistance to eastern filbert blight and exhibit variations in nut size, shape, kernel percentage, and maturity timing, which affect yield and disease susceptibility.
Innovation Solution
The development of the 'Wepster' cultivar, resulting from a controlled cross between 'Tonda Pacifica' and OSU 440.005, exhibits high vigor, resistance to eastern filbert blight, and distinct DNA markers linked to disease resistance, along with unique characteristics such as yellowish-green leaves and specific nut morphology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current hazelnut cultivars are used, then they exhibit variations in nut size, shape, kernel percentage, and maturity timing, but they lack robust resistance to eastern filbert blight
Solution Approach 1:
The invention combines the eastern filbert blight resistance gene from cultivar Gasaway with the desirable nut characteristics from cultivar Tonda Gentile delle Langhe through controlled cross-breeding. This merging of genetic material from two different cultivars produces a new cultivar that simultaneously exhibits both disease resistance and high productivity traits.
Solution Approach 2:
The invention introduces specific localized genetic traits (the dominant resistance gene from Gasaway) into the Tonda Gentile delle Langhe cultivar background. This allows the new cultivar to maintain the superior nut quality and yield characteristics of Tonda Gentile delle Langhe while adding the specific disease resistance property from Gasaway at a localized genetic level.
2Reliability
If breeding programs focus on disease resistance, then resistance to eastern filbert blight improves, but variations in nut size, shape, kernel percentage, and maturity timing may increase
Solution Approach 1:
The invention changes the genetic parameters of the parent cultivars through controlled cross-breeding to produce offspring with optimized combinations of traits. By selecting specific parents (Tonda Gentile delle Langhe for nut quality and Gasaway for resistance) and controlling the breeding process, the new cultivar achieves consistent expression of both resistance and quality parameters across generations.
Solution Approach 2:
The breeding program uses feedback from evaluating progeny performance in terms of both disease resistance and nut quality parameters. By systematically assessing multiple generations and selecting individuals that maintain both resistance and consistent quality traits, the program refines the cultivar to achieve stability in both resistance and productivity characteristics.
Data Source
AI summary
A new and distinct cultivar of Corylus plant named ‘Wepster’ characterized by high vigor and an upright-spreading plant habit, yellowish-green developing and fully expanded leaves during the spring and summer, resistance to eastern filbert blight caused by the fungus Anisogramma anomala (Peck) E. Müller, presence of random amplified polymorphic DNA markers 152-800 and 268-580 amplified by the polymerase chain reaction and which are linked to a dominant allele for resistance to eastern filbert blight from the cultivar Gasaway, expression of incompatibility alleles S1 and S2 in the styles, and DNA fingerprints at 8 of 20 microsatellite marker loci differ from both parents OSU 440.005 and ‘Tonda Pacifica’, and from one parent at an additional 12 marker loci.