| The construction of maps of autotetraploids is a much greater problem than that of maps of allogamous diploids. |
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| The Catipes group has amphimictic diploids and tetraploids and derived from them are all of the polyploid agamic complexes in the genus. |
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| It includes more than 80 wild coffee species, all of which are diploids except C. arabica. |
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| Following selection, haploids produce gametes mitotically and diploids produce gametes meiotically that then enter the random mating pool. |
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| At the MAT locus, parental alleles in diploids differ by a heterology of 700 bp. |
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| We conclude that the haploids had a greater frequency of mutant phenotypes than the diploids. |
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| Previous work has calculated the covariance expected under autosomal inheritance in diploids and haploids. |
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| Arabidopsis thaliana and many closely related species are diploids with relatively few recent gene duplications. |
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| They are all native to the subtropical and temperate regions of South America, and sexual diploids and apomictic polyploids are known for almost all of them. |
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| Moreover, the high loads of inviable or weak aneuploid pollen produced by triploids induce high selfing rates in normally self-incompatible sexual diploids. |
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| Data are presented on the natural occurrence of polyploids, the induction of tetraploids using colchicine and nuclear DNA amounts of diploids and polyploids of both species. |
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| Although sporulation is a clear indication of diploidy, the absence of sporulation is uninformative since some diploids sporulate at very low frequencies. |
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| The materials from five Japanese populations had 36 chromosomes in the meiotic cells, and 64 spores per sporangium, which suggested that these species are sexual diploids. |
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| Yet more chromosome races are found than just the basic diploids and tetraploids, suggesting that agmatoploidy has also played a role in the evolution of this species. |
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| At sexual maturation of the dwarf surf clam, all gynogenetic diploids were female, indicating that this species has XX females and XY males determined by Y domination. |
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| All triploid oysters produced by mating tetraploids and diploids. |
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