Use of 2n gametes for the production of sexual polyploids from sterile Oriental × Asiatic hybrids of lilies (Lilium)

@article{BarbaGonzlez2004UseO2,
  title={Use of 2n gametes for the production of sexual polyploids from sterile Oriental × Asiatic hybrids of lilies (Lilium)},
  author={Rodrigo Barba-Gonz{\'a}lez and Andrew Lokker and Ki-Byung Lim and Munikote S. Ramanna and Jaap M. van Tuyl},
  journal={Theoretical and Applied Genetics},
  year={2004},
  volume={109},
  pages={1125-1132}
}
Sixteen Oriental and 12 Asiatic cultivars were crossed in 158 different combinations. A total of 708 F1 hybrids were obtained from 86 of the different combinations of 15 Oriental and 11 Asiatic cultivars. Because the Lilium cultivars (2n=2x=24) used for the production of these hybrids belong to two different taxonomic sections—Archelirion (O) and Sinomartagon (A), respectively—the F1 hybrids (OA) could be obtained only through embryo, embryo sac rescue, ovary slice or ovule culture. Most of the… Expand
Occurrence of 2n gametes in the F1 hybrids of Oriental × Asiatic lilies (Lilium): Relevance to intergenomic recombination and backcrossing
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Based on in vitro pollen germination it was proved for two genotypes that 2n pollen was viable only during the first day of anthesis, and it was possible to use 1n pollen successfully for backcrossing and for intergenomic recombination in BC1 progenies. Expand
The use of 2n gametes for introgression breeding in Oriental x Asiatic lilies
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A molecular cytogenetic investigation was conducted on the possibilities of introgression of characters between Oriental and Asiatic lilies through the use of 2n gametes, confirming the presence of both O and A genome chromosomes with some of them possessing recombinant segments. Expand
Genome composition of triploid lily cultivars derived from sexual polyploidization of Longiflorum × Asiatic hybrids (Lilium)
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About 19 cultivars, which had originated from backcrosses between F1 LA (Longiflorum × Asiatic) hybrids as female parents and Asiatic cultivars as male parents, were analyzed with genomic in situ hybridization and showed that intergenomic recombination might play an important role during the selection of the cultivars directly from BC1 progenies. Expand
Production of Polyploids and Unreduced Gametes in Lilium auratum × L. henryi Hybrid
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The results of this study indicate that production and analysis of F1 AuH hybrids and their progeny through sexual polyploidization can be useful for efficient creation of important horticultural traits. Expand
Analysis of the meiosis in the F(1) hybrids of Longiflorum x Asiatic (LA) of lilies (Lilium) using genomic in situ hybridization.
TLDR
The present investigation not only explained the reason for sterility of the F(1) LA hybrids and the variation of their BC( 1) progenies, but also provided a new method to analyze crossover types in other F(2) interspecific hybrids as well. Expand
Relevance of unilateral and bilateral sexual polyploidization in relation to intergenomic recombination and introgression in Lilium species hybrids
TLDR
The nature of interspecific lily hybrids obtained from uni- and bilateral sexual polyploidization leading to allotriploid and allotetraploid formation is discussed in the context of introgression and intergenomic recombination. Expand
Intergenomic recombination in F1 lily hybrids (Lilium) and its significance for genetic variation in the BC1 progenies as revealed by GISH and FISH.
TLDR
Intergenomic recombination was assessed in a BC1 population of Oriental (O)xAsiatic (A) lilies (Lilium) backcrossed to Asiatic parents, and an important feature of A x OA backcross progeny is the occurrence of substitutions for the segment distal in the crossover wherever the recombinant chromosome O/A was present. Expand
Progenies of allotriploids of Oriental × Asiatic lilies (Lilium) examined by GISH analysis
TLDR
With the aim of utilizing allotriploid Asiatic lily hybrids (Lilium) in introgression breeding, different types of crosses were made with two types of triploids used as parents, derived from: (a) mitotic polyploidization and (b) sexual polyploidsization. Expand
A molecular cytogenetic study of intergenomic recombination and introgression of chromosomal segments in lilies (Lilium)
TLDR
A molecular cytogenetic investigation was conducted to evaluate the amount of recombination and introgression of characters between Longiflorum - Asiatic (LA) and Oriental - As iatic (OA) hybrids through the use of n and 2n gametes. Expand
A Molecular Cytogenetic Analysis of Introgression in Backcross Progenies of Intersectional Lilium Hybrids
TLDR
Based on the cytological analysis of progenies derived from the use of both haploid and 2n gametes, cytological maps of three different genomes have been constructed and the relevance of these analyses for introgression in Lilium is demonstrated. Expand
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