Korpiko Raspberry Breeding for Virus Resistance and Yield
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Solution Overview
Problem
Existing red raspberry varieties lack desirable traits such as high yields, resistance to Raspberry Bushy Dwarf Virus, and optimal fruit characteristics like size, shape, and color, as well as spine density, which affect productivity and disease susceptibility.
Innovation Solution
The new red raspberry variety 'Korpiko' is developed through crossing 'Chilcotin' and 'Waimea', exhibiting a semi-spine-free growth habit, high yields of large, conical, bright red fruit, and resistance to Raspberry Bushy Dwarf Virus, with improved cane numbers and fruit quality, suitable for fresh market production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing red raspberry varieties are used, then they can be grown in standard conditions, but they lack desirable traits such as high yields, resistance to Raspberry Bushy Dwarf Virus, and optimal fruit characteristics
Solution Approach 1:
The patent applies composite breeding by crossing two distinct raspberry varieties ('Chilcotin' and 'Waimea') to create a new composite variety 'Korpiko' that combines disease resistance from one parent with high yield and optimal fruit characteristics from the other parent, resolving the contradiction between reliability and productivity
2Ease of operation
If spine-free growth habit is selected, then ease of operation is improved, but productivity may be reduced due to loss of protective spines
Solution Approach 1:
The patent applies local quality by selecting for reduced spines specifically on the cane surfaces that come into contact with handlers during harvesting and maintenance, while maintaining overall plant vigor and fruit production capacity, thus improving ease of operation without significantly compromising productivity
3Shape
If larger fruit size is achieved, then fruit quality is improved, but yield per unit area may be reduced
Solution Approach 1:
The patent applies parameter changes by optimizing the balance between individual fruit size and number of fruits through controlled breeding parameters, achieving a medium-large fruit size (4-6g) that maximizes both quality and yield per hectare (14-18 T/ha), resolving the contradiction between fruit size and productivity
Data Source
AI summary
A new and distinct floricane fruiting red raspberry, Rubus idaeus L., variety is described. The variety results from selection among a population of seedlings derived from controlled pollination crossing of the raspberry varieties known as ‘Chilcotin’ (not patented) and ‘Waimea’ (not patented). The fruit of this new variety has an attractive appearance characterized by uniformly large berry size, good fruit firmness, and medium-red fruit color. The new variety is distinguished from others by its high yields of firm, attractive, uniformly sized, large, red berries that ripen in the mid season. The plant exhibits a semi spine-free upright growth habit, of strong vigor. In addition, the plant has displayed resistance to Raspberry Bushy Dwarf Virus (RBDV) under New Zealand conditions. Fruit of the new variety appears suitable for the fresh fruit market. The variety has been named ‘Korpiko’.