Corn Variety CV590239 Breeding Segmentation for Uniformity

The breeding process is segmented into distinct phases: creating diverse populations through cross-pollination, selecting uniform individuals through self-pollination, and maintaining stability through repeated selfing. This segmentation allows the system to achieve both diversity (in early generations) and uniformity (in later inbred generations), resolving the contradiction between trait combination and performance predictability.

The patent applies preliminary action by creating and evaluating multiple inbred lines before developing final hybrids. The breeder performs preliminary self-pollination and selection to establish uniform parental lines, then uses these pre-prepared lines for hybrid development. This preliminary work ensures that when hybrids are created, the parental uniformity guarantees predictable F1 performance while maintaining the ability to combine desirable traits.

The breeding program is divided into segments that first create diversity through controlled cross-pollination between different inbred lines, then maintain uniformity through self-pollination of selected individuals. This segmentation allows the system to generate genetic diversity at the population level while maintaining uniformity at the individual inbred line level, resolving the contradiction between uniformity and diversity.

The patent applies local quality by making different parts of the breeding program have different genetic characteristics: the population as a whole maintains diversity through multiple inbred lines, while each individual inbred line achieves uniformity through repeated selfing. This local differentiation allows simultaneous presence of diversity (across lines) and uniformity (within lines).

The breeding program incorporates feedback mechanisms where uniformity and stability of inbred lines are continuously evaluated across generations. The breeder monitors phenotypic and genotypic uniformity and adjusts the breeding strategy accordingly, stopping self-pollination cycles when sufficient uniformity is achieved. This feedback approach prevents unnecessary extended breeding cycles while ensuring adequate inbred plant stability.

The patent applies parameter changes by modifying breeding strategies based on observed uniformity levels. When sufficient uniformity is achieved in early generations, the breeder changes the parameter from continued self-pollination to maintenance pollination or direct hybrid development. This dynamic adjustment of breeding parameters reduces unnecessary time while maintaining the required inbred plant uniformity.