Pea Line 08240772 Breeding for Uniform Hybrid Performance
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Solution Overview
Problem
Current pea breeding methods face challenges in developing uniform, stable varieties with desirable traits such as resistance to diseases and environmental tolerance, as they often result in unpredictable performance due to genetic non-uniformity in hybrid plants.
Innovation Solution
The development of pea line 08240772, which is a uniform and stable variety with specific traits like resistance to powdery mildew and downy mildew, achieved through pedigree selection and genetic manipulation, including backcrossing and genetic transformation, to introduce desired loci and confer traits like herbicide tolerance and modified carbohydrate metabolism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pedigree breeding and recurrent selection are used to develop inbred plants, then genetic diversity is increased, but uniformity and predictability of hybrid performance decrease
Solution Approach 1:
The breeding program segments the development process into distinct phases: first developing highly homozygous inbred lines through multiple generations of selfing to ensure uniformity, then crossing these standardized lines to produce predictable F1 hybrids. This segmentation allows genetic diversity to be introduced systematically while maintaining uniformity within each line.
Solution Approach 2:
The patent applies preliminary action by extensively pre-developing homozygous inbred lines through multiple generations of selfing and selection before crossing. This preliminary homozygosity ensures that when crosses are made, the F1 hybrids exhibit uniform and predictable performance, resolving the contradiction between genetic diversity and uniformity.
2Adaptability or versatility
If cross-pollination is used to create hybrid plants, then genetic diversity is increased, but uniformity of the population decreases
Solution Approach 1:
The patent applies local quality by ensuring that each parent line possesses high homozygosity and uniformity (local uniformity) before crossing. This allows the hybrid population to exhibit consistency in key traits while still benefiting from the genetic diversity introduced through cross-pollination between different uniform parent lines.
Solution Approach 2:
The patent uses homogeneity by developing highly homozygous inbred parent lines that are uniform within themselves. When these homogeneous lines are crossed, the resulting F1 hybrids display uniformity because both parents contribute consistent, predictable genetic backgrounds, despite the genetic diversity between the parent lines.
3Manufacturing precision
If self-fertilization is used to develop inbred lines, then uniformity is improved, but genetic diversity is reduced
Solution Approach 1:
The patent merges multiple uniform inbred lines through cross-pollination to create hybrid varieties. Each individual inbred line maintains high uniformity through self-fertilization, but the merging of several such lines introduces genetic diversity while preserving the uniformity characteristics within the hybrid population.
Solution Approach 2:
The patent creates inbred lines that serve dual functions: they maintain uniformity through self-fertilization for consistent performance, and simultaneously serve as diverse genetic parents for hybrid development. This multi-functionality resolves the contradiction between uniformity and genetic diversity.
Data Source
AI summary
The invention provides seed and plants of the pea line designated 08240772. The invention thus relates to the plants, seeds and tissue cultures of pea line 08240772, and to methods for producing a pea plant produced by crossing a plant of pea line 08240772 with itself or with another pea plant, such as a plant of another line. The invention further relates to seeds and plants produced by such crossing. The invention further relates to parts of a plant of pea line 08240772, including the seed, pod, and gametes of such plants.