Block Inheritance of Viability Genes in Plant Species

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Abstract
Hybridization experiments in Triticum, Zea, Gossypium, Gilia, and Godetia (Clarkia) provide evidence concerning the genie contents of chromosome segments which differ by rearrangements between species. In Triticum and Zea, morphology-determining genes can be located on known or probable rearranged segments. In Gossypium there are blocks of morphological and viability genes on what appear to be rearranged segments. In Gilia and Godetia there are rearranged segments which appear to harbor linked morphological and viability genes. The evidence from all studies combined suggests that rearranged segments between plant species carry genes for growth and vigor associated with morphological markers.