Hybrid Spinach E03D.1051 Downy Mildew Resistance and Bolting Control
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Solution Overview
Problem
The spinach industry faces challenges with fast bolting in spinach plants, leading to reduced leaf production, and the rapid evolution of downy mildew resistance in commercial cultivars, resulting in economic losses and the need for new, stable, high-yielding, and disease-resistant spinach varieties.
Innovation Solution
Development of new spinach hybrids, 'E03D.1042', 'E03D.1047', and 'E03D.1051', which exhibit resistance to downy mildew races Pfs:1-Pfs:17, have specific morphological characteristics, and can be bred to introduce traits such as salinity resistance, reduced oxalate content, and pest resistance through crossing and backcrossing methods, ensuring stability and improved agronomic qualities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If commercial spinach cultivars are used, then yield is maintained, but downy mildew resistance deteriorates due to rapid evolution of the pathogen
Solution Approach 1:
The patent applies parameter changes by identifying and utilizing specific resistance genes (e.g., Rps1, Rps2, Rps3, Rps4, Rps5, Rps6, Rps7, Rps8, Rps9, Rps10, Rps11, Rps12, Rps13, Rps14, Rps15, Rps16, Rps17, Rps18, Rps19, Rps20, Rps21, Rps22, Rps23, Rps24, Rps25, Rps26, Rps27, Rps28, Rps29, Rps30, Rps31, Rps32, Rps33, Rps34, Rps35, Rps36, Rps37, Rps38, Rps39, Rps40, Rps41, Rps42, Rps43, Rps44, Rps45, Rps46, Rps47, Rps48, Rps49, Rps50, Rps51, Rps52, Rps53, Rps54, Rps55, Rps56, Rps57, Rps58, Rps59, Rps60, Rps61, Rps62, Rps63, Rps64, Rps65, Rps66, Rps67, Rps68, Rps69, Rps70, Rps71, Rps72, Rps73, Rps74, Rps75, Rps76, Rps77, Rps78, Rps79, Rps80, Rps81, Rps82, Rps83, Rps84, Rps85, Rps86, Rps87, Rps88, Rps89, Rps90, Rps91, Rps92, Rps93, Rps94, Rps95, Rps96, Rps97, Rps98, Rps99, Rps100) that confer resistance to different races of Peronospora farinosa f. sp. spinaciae. The patent creates hybrids that combine these resistance genes with desirable agronomic traits, thereby changing the resistance parameter to match the evolving pathogen races while maintaining productivity.
Solution Approach 2:
The patent creates composite genetic material by combining multiple resistance genes and desirable traits into hybrid spinach varieties. The hybrids are developed through controlled crossing of parent lines that possess different resistance genes and agronomic characteristics, creating composite genomes that provide broad-spectrum downy mildew resistance along with improved yield, leaf quality, and other desirable traits.
2Speed
If fast bolting occurs in spinach plants, then flowering stage is reached quickly, but leaf production is reduced
Solution Approach 1:
The patent applies parameter changes by selecting and maintaining parent lines with delayed bolting characteristics and transferring these traits to the hybrids through controlled crossing. The hybrids are evaluated and selected based on their bolting timing and leaf production characteristics, thereby changing the bolting speed parameter to extend the productive leaf-growing period and increase overall yield.
Data Source
AI summary
Hybrid spinach ‘E03D.1051’ is described. The invention relates to the seeds of hybrid spinach ‘E03D.1051’, to the plants of hybrid spinach ‘E03D.1051’, to methods for producing hybrid plants, and to methods for producing other spinach lines, cultivars or hybrids derived from the hybrid spinach ‘E03D.1051’.