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The Genus Collinsia. XXV. Additional Evidence for Preferential Pairing in Two Amphidiploids and Two Triploid Interspecific Hybrids

E. D. Garber

Abstract

Two diploid interspecific Colllisia hybrids with interchange complexes, one with a complex of four chromosomes and the other with one of six, yielded spontaneous amphidiploids with a maximum number of two quadrivalents; two spontaneous interspecific triploids had a maximum number of two trivalents Chromosome associations in the amphidiploids and in the triploid hybrids were explained by assuming a preferential pairing of structurally identical homologs.

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Key concepts: Interspecific hybrids, Interspecific competition, Chromosome pairing, Ploidy, Biology, Hybrid, Pairing, Homologous chromosome