Purple Elite Carrot Breeding via CMS and Segmentation
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Solution Overview
Problem
Current carrot breeding methods struggle to produce uniform varieties with desirable traits such as increased yield, disease resistance, and specific color combinations, leading to unpredictable performance due to genetic non-uniformity in hybrid plants.
Innovation Solution
Development of the new carrot variety 'Purple Elite' with distinct morphological and physiological characteristics, including a purple skin, longer leaf blades, and specific root traits, which can be propagated to produce uniform plants with improved traits through breeding methods that utilize self-pollination and selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hybrid plants are produced by crossing two heterozygous plants, then genetic diversity is increased, but uniformity and predictability of performance deteriorate
Solution Approach 1:
The patent applies preliminary action by developing homozygous inbred lines through multiple generations of self-pollination and selection before creating the hybrid. This preliminary inbreeding process ensures that the parent lines are genetically uniform and stable, which then produces predictable and uniform F1 hybrid offspring when crossed, resolving the contradiction between genetic diversity and performance uniformity.
2Reliability
If self-pollination and selection are used to develop inbred plants, then uniformity is improved, but breeding time and complexity increase
Solution Approach 1:
The patent applies parameter changes by utilizing cytoplasmic male sterility (CMS) system, which is a specific genetic parameter change in the cytoplasm that prevents self-pollination. This allows for controlled cross-pollination between designated parent lines, significantly reducing the breeding time required to produce uniform F1 hybrids compared to traditional self-pollination methods, thus resolving the contradiction between uniformity and breeding time.
3Adaptability or versatility
If traditional breeding methods are used, then existing varieties are maintained, but development of new varieties with specific trait combinations remains limited
Solution Approach 1:
The patent applies segmentation by dividing the breeding program into distinct segments: developing separate homozygous inbred parent lines with specific desirable traits, then combining them through controlled cross-pollination to produce F1 hybrids. This segmentation allows for systematic combination of multiple traits (e.g., disease resistance, yield, quality characteristics) from different parent lines, making the creation of new varieties with specific trait combinations more manageable and repeatable.
Data Source
AI summary
The present invention relates to plants of a carrot variety PURPLE ELITE and seeds and progeny thereof. The invention further relates to methods for producing a carrot plant by traditional breeding methods. The invention further relates to a method for producing a carrot plant containing in its genetic material one or more transgenes.