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128 results for “hybrid origin”
FIGURE 12 in Anatomy and morphology suggest a hybrid origin of Zamia katzeriana (Zamiaceae)
FIGURE 12. Principal components analysis on 9 anatomical leaflet variables: S = Zamia splendens, K = Z. katzeriana, L = Z. loddigesii.
FIGURE 11 in Anatomy and morphology suggest a hybrid origin of Zamia katzeriana (Zamiaceae)
FIGURE 11. Scatter plot of scores derived from the functions produced by stepwise discriminant analysis of 12 morphometric ratios from populations of Zamia splendens, Z. loddigesii and Z. katzeriana
FIGURE 15. A–B in Anatomy and morphology suggest a hybrid origin of Zamia katzeriana (Zamiaceae)
FIGURE 15. A–B, Zamia katzeriana TS leaflet at margin showing variation in hypodermal fibre layers; C, Z. splendens TS leaflet at margin showing single layer of hypodermal fibres; D, Z. loddigesii TS leaflet at margin showing up to three layers of hypodermal fibres and a continuous layer extending along adaxial portion. Stain Safranin O and Fast Green FCF. All scale bars = 50 μm.
FIGURE 4 in Anatomy and morphology suggest a hybrid origin of Zamia katzeriana (Zamiaceae)
FIGURE 4. Variation of median leaflet of leaves: A, Zamia splendens; B, Z. katzeriana; C, Z. loddigesii.
FIGURE 3 in Anatomy and morphology suggest a hybrid origin of Zamia katzeriana (Zamiaceae)
FIGURE 3. Comparison of leaflets between species: A, Zamia splendens; B, Z. katzeriana; C, Z. loddigesii. Scale Bar = 2 cm.
FIGURE 2 in Anatomy and morphology suggest a hybrid origin of Zamia katzeriana (Zamiaceae)
FIGURE 2. Comparison of leaves between species: A, Zamia splendens; B, Z. katzeriana; C, Z. loddigesii.
FIGURE 10 in Anatomy and morphology suggest a hybrid origin of Zamia katzeriana (Zamiaceae)
FIGURE 10. Principal components analysis on morphological data between populations of Zamia splendens, Z. loddigesii and Z. katzeriana: S = Z. splendens, K = Z. katzeriana, L = Z. loddigesii.
FIGURE 6 in Anatomy and morphology suggest a hybrid origin of Zamia katzeriana (Zamiaceae)
FIGURE 6. Megastrobili of Zamia katzeriana, showing apiculate to rounded apex and short erect peduncles.
FIGURE 13 in Anatomy and morphology suggest a hybrid origin of Zamia katzeriana (Zamiaceae)
FIGURE 13. Discriminant analysis on 9 leaflet anatomical variables of Zamia splendens, Z. loddigesii and Z. katzeriana.
FIGURE 1 in The Origin of New Natural hybrid, Goodyera maximo-velutina (Orchidaceae) from Jeju Island, Korea
FIGURE 1. The morphological comparison of Goodyera × maximo-velutina and their putative parental taxa. The habitus images from type locality (A, D, G), photographic images of ovary (B, E, H) and leaf venation (C, F, I). G. × maximo-velutina (A–C), G. maximowicziana (D–F), G. velutina (G–I).
FIGURE 2 in The Origin of New Natural hybrid, Goodyera maximo-velutina (Orchidaceae) from Jeju Island, Korea
FIGURE 2. Phylogenetic tree obtained by Bayesian phylogenetic inference of ITS region. Numbers above branches represent posterior probabilities.
FIGURE 5. G in The Origin of New Natural hybrid, Goodyera maximo-velutina (Orchidaceae) from Jeju Island, Korea
FIGURE 5. G. × maximo-velutina N.S. Lee & J.H. So A. Lateral sepal B. Dorsal sepal C. Lateral petal D. Lateral view of flower E. Bract F. Lateral and Face view of lip G. Face view of flower H. Habit.
FIGURE 4 in The Origin of New Natural hybrid, Goodyera maximo-velutina (Orchidaceae) from Jeju Island, Korea
FIGURE 4. Phylogenetic tree obtained by Bayesian phylogenetic inference of the combined three cpDNA regions. Numbers above branches represent posterior probabilities.
FIGURE 3 in The Origin of New Natural hybrid, Goodyera maximo-velutina (Orchidaceae) from Jeju Island, Korea
FIGURE 3. Phylogenetic tree obtained by Bayesian phylogenetic inference of ITS region. Numbers above branches represent posterior probabilities. The clone sequences are indicated by "c" following the name of taxa.
FIGURE 4 in The hybrid origin of Phai Liang, a bamboo of recent introduction into horticulture in Southeast Asia, and a new nothogenus, ×Thyrsocalamus (Bambuseae: Bambusinae)
FIGURE 4. Characteristics in the type collection (K.M. Wong & D. Ohrnberger WKM 3555) of × Thyrsocalamus liang from the Mae Hia Bamboo Collection, Royal Project Foundation, Chiang Mai, Thailand. A. Culm internode with scattered white hairs at the uppermost part; B. Culm leaves with erect blades, leafy branches, and branches with inflorescences at the peak of anthesis. Photographs by K.M. Wong.
FIGURE 1 in The hybrid origin of Phai Liang, a bamboo of recent introduction into horticulture in Southeast Asia, and a new nothogenus, ×Thyrsocalamus (Bambuseae: Bambusinae)
FIGURE 1. Schematic diagram showing the position of haplotype-specific primers and their site numbers in the partial GBSSI gene. Arrows indicate the directions of primers.
FIGURE 3 in The hybrid origin of Phai Liang, a bamboo of recent introduction into horticulture in Southeast Asia, and a new nothogenus, ×Thyrsocalamus (Bambuseae: Bambusinae)
FIGURE 3. Phai Liang cultivated in the Rimba Ilmu Botanic Garden of the University of Malaya (A–C) and Penang Botanical Garden (D–H). A. Clump habit; B. Internodes and elliptic branch buds; C. Culm sheaths with pale brown hairs; D. Clump habit; E. Subrotundovate primary branch bud at a culm node; F. Spreading culm-sheath blades on a shoot; G. Foliage leaves; H. Pseudospikelets with purpleblue to maroon anthers extruded from florets. Photographs by K.M. Wong.
FIGURE 2 in The hybrid origin of Phai Liang, a bamboo of recent introduction into horticulture in Southeast Asia, and a new nothogenus, ×Thyrsocalamus (Bambuseae: Bambusinae)
FIGURE 2. Phylogenetic tree reconstructed based on partial nuclear GBSSI marker. Numbers above nodes are bootstrap values for maximum parsimony analysis; numbers below nodes are posterior probabilities for Bayesian inference.
FIGURE 5. Thyrsostachys siamensis. A in The hybrid origin of Phai Liang, a bamboo of recent introduction into horticulture in Southeast Asia, and a new nothogenus, ×Thyrsocalamus (Bambuseae: Bambusinae)
FIGURE 5. Thyrsostachys siamensis. A. Planted clump at Gurun, Kedah, Malaysia; B. Clump base showing persistent culm sheaths, planted clump (WKM 3511) along Holland Road, Singapore; C. Dense silvery white appressed hairs on culm sheaths of a shoot (WKM 3511); D. Subrotund-ovate primary branch bud (WKM 3511); E. Stiffly erect clump habit, Kuching, Malaysia. Photographs by K.M. Wong.
Data from: Strongly asymmetric hybridization barriers shape the origin of a new polyploid species and its hybrid ancestor
PREMISE OF THE STUDY: Hybridization between diploids and tetraploids can lead to new allopolyploid species, often via a triploid intermediate. Viable triploids are often produced asymmetrically, with greater success observed for "maternal-excess" crosses where the mother has a higher ploidy than the father. Here we investigated the evolutionary origins of Mimulus peregrinus, an allohexaploid recently derived from the triploid M. ×robertsii, to determine whether reproductive asymmetry has shaped the formation of this new species. METHODS: We used reciprocal crosses between the diploid (M. guttatus) and tetraploid (M. luteus) progenitors to determine the viability of triploid M. ×robertsii hybrids resulting from paternal- vs. maternal-excess crosses. To investigate whether experimental results predict patterns seen in the field, we performed parentage analyses comparing natural populations of M. peregrinus to its diploid, tetraploid, and triploid progenitors. Organellar sequences obtained from pre-existing genomic data, supplemented with additional genotyping was used to establish the maternal ancestry of multiple M. peregrinus and M. ×robertsii populations. KEY RESULTS: We found strong evidence for asymmetric origins of M. peregrinus, but opposite to the common pattern, with paternal-excess crosses significantly more successful than maternal-excess crosses. These results successfully predicted hybrid formation in nature: 111 of 114 M. ×robertsii individuals, and 27 of 27 M. peregrinus, had an M. guttatus maternal haplotype. CONCLUSION: This study, which includes the first Mimulus chloroplast genome assembly, demonstrates the utility of parentage analysis through genome skimming. We highlight the benefits of complementing genomic analyses with experimental approaches to understand asymmetry in allopolyploid speciation.
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