In agriculture and gardening, hybrid seed is produced by intentionally cross-pollinated plants that are genetically numerous. Hybrid seed is common in industrial agriculture and residence gardening. It is considered one of the primary contributors to the dramatic rise in agricultural output during the last half of the twentieth century. Alternatives to hybridization embody open pollination and clonal propagation. Hybrid seeds are used to enhance the characteristics of the ensuing plants, reminiscent of higher yield, larger uniformity, improved color, disease resistance. An vital factor is the heterosis or combining potential of the parent plants. Crossing any particular pair of inbred strains could or might not result in superior offspring. The mother or father strains used are subsequently carefully chosen so as to achieve the uniformity that comes from the uniformity of the dad and mom, and the superior performance that comes from heterosis. Elite inbred strains are used that specific properly-documented and constant phenotypes (similar to excessive crop yield) which might be relatively good for inbred plants. Hybrid seeds planted by the farmer produce similar plants, while the seeds of the following generation from those hybrids won’t persistently have the specified traits. Controlled hybrids present very uniform traits as a result of they are produced by crossing two inbred strains. Within the US, experimental agriculture stations in the 1920s investigated the hybrid crops, and by the nineteen thirties farmers had broadly adopted the first hybrid maize. Hybrid Corn, published in the Yearbook of Agriculture, 1962″. United States Department of Agriculture. David Tay (n.d.). “Vegetable Hybrid Seed Production”. Seeds: Trade, Production and Technology (PDF). Paul Conkin (2008). “5.4 Plant and Animal Breeding”. A Revolution Down on the Farm. University Press of Kentucky.