Flower Color Inheritance in Inbred Progenies of Impatiens Interspecific Hybrids

Stephens, Loren C.; Weigle, J. L.; Krell, S. L.

doi:10.1093/oxfordjournals.jhered.a110472

Cited by 7 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a pollen parent, 7851-1 crossed with I. hawkeri or I. platypetala was JONES (1974) showed that, with Gibasis schiedeana, it was possible to find fertility in triploid hybrids and backcrosses among cytotypes with a Robertsonian relationship. The use of 7851-1 in releasing flower color variation in backcross progenies (STEPHENS et al 1988) has shown that unreduced gametes can be useful in interspecific hybridization in Impatiens. Such inbreeding, while not leading directly to new cultivars, may lead to stabilized lines that are fertile and can be interbred during selection for more heat and drought tolerance.…”

Section: Discussionmentioning

confidence: 99%

“…In spite of the different ploidies amongst these species and the corresponding sterility barriers, some interspecific hybrids have been found pollen fertile (PASUTTI et al 1977;PASUTTI and WEIGLE 1980;HICKS et al 1987;STEPHENS et al 1988). One hybrid seedling in particular, I .…”

mentioning

confidence: 99%

“…hawkeri x platypetala 785 1 -1, had pollen that varied in size, with only the larger pollen grains capable of in vitro germination (HICKS et al 1987). Additionally, 7851-1 was successfully crossed to Tangeglow, a commerical seed-propagated cultivar, and 7851-1 was used as the recurrent pollen parent in 2 successive backcrosses (STEPHENS et al 1988).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Formation of Unreduced Pollen by an Impatiens Hawkeri × Platypetala Interspecific Hybrid

Stephens

2004

Hereditas

Self Cite

View full text Add to dashboard Cite

The Impatiens hawkeri Bull. x I. platypetala Lindl. hybrid 7851-1 was studied for characteristics of unreduced pollen.When I. hawkeri x platypetah 785 1-1 (2n = 24) was crossed as a pollen parent to I. hawkeri x aurantiaca Tangeglow (2n = 24), offspring contained somatic chromosome numbers ranging from 2n = 30 to 2n = 36. In root-tip cells of each of these offspring, there were 4 I. aurantiara chromosomes, as expected after normal meiosis of the seed parent Tangeglow. This result showed that unreduced pollen was contributed by 7851-1. Additionally, a study of 7851-1 micropores showed that, at the tetrad stage, 76 'X o f cello w.xe dyads, and microspores forming from dyads of 7851-1 were noticeably larger than microspores forming the tetrads. An examination of pollen meiosis in 7851-1 showed that the meiotic mechanism for unreduced pollen formation was parallel spindles in the second meiotic division. As a seed parent, 7851-1 was sterile both in crosses and by self pollination. As a pollen parent, 7851-1 was successfully crossed only to seed parents containing I. uutwztiucu chromosomes, indicating that I . auvuntiacu is a bridging species in interspecific crosses involving I. haivkeri and I. plutypetala. The implications for breeding New Guinea Imputiens (I. huwkeri) cultivars using interspecific hybridization are discussed.

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Formation of Unreduced Pollen by an Impatiens Hawkeri × Platypetala Interspecific Hybrid

Stephens

2004

Hereditas

Self Cite

View full text Add to dashboard Cite

show abstract

“…For improving the variation of flower color, interspecific hybridization has successfully been conducted to create novel hybrids owing orange flower color in Impatiens (Stephens et al 1988) and Ornithogalum (Griesbach et al 1993). Besides, the hybrid of Camellia displaying a novel golden flower color was produced by the interspecific hybridization between Camellia chrysantha (yellow flower color) and C. japonica cv.…”

Section: Introductionmentioning

confidence: 99%

Inter-sectional hybrids obtained from reciprocal crosses between Begonia semperflorens (section Begonia) and B. ‘Orange Rubra’ (section Gaerdita × section Pritzelia)

Chen

Mii

2012

Breed. Sci.

View full text Add to dashboard Cite

Inter-sectional hybrids were successfully obtained by the reciprocal crosses between 11 cultivars (including 6 diploids and 5 tetraploids) of Begonia semperflorens (SS & SSSS genomes) and B. ‘Orange Rubra’ (RR genome) with the aid of in vitro culture of mature or immature seeds on MS medium containing 0.1 mg l−1 α-naphthylacetic acid, 0.1 mg l−1 6-benzyladenine, 10 mg l−1 gibberellic acid, 30 g l−1 sucrose and 2.5 g l−1 gellan gum. Embryo rescue as ovary culture with immature seeds 12th–16th day after pollination (DAP) generally gave higher efficiency of plantlet formation, but in some cross combinations, culture of mature seeds (30 DAP) resulted in higher yield of plantlets. Flow cytometric analysis revealed that they were consisted of the plants with various genomic combinations (RS, RR, RSS, RRS, RRSS and RRRRSS) as estimated by the DNA contents of both parents. Hybridity of these plants with various genomic combinations including RR was confirmed by random amplified polymorphic DNA analysis. These results suggested that unreduced gamete formation and spontaneous chromosome doubling were involved in the hybrid formation of various ploidy levels and genomic combinations. These hybrids showed various levels of intermediate traits between both parents according to the genomic compositions, and some of them had desirable characters of both parents.

show abstract

“…Production of amphidiploids overcomes the problem of sterility, but makes selection for heat tolerance more tedious. Some naturally occurring fertility has been found by crossing I mpatiens 'Tangeglow' with a New Guinea x Java hybrid, both parents being 24-chromosome interspecific hybrids (Stephens et al, 1988) . The nature of this fertility was investigated in this study.…”

Section: IImentioning

confidence: 99%

Fertility and chromosome number in interspecific Impatiens hybrids

Fruth¹

View full text Add to dashboard Cite

The effects of chromosome number on female fertility of interspecific hybrids among Impatiens from Java (I. platypetala Lindl.), New Guinea (I. hawkeri Bull.), and Celebes (I. aurantiaca Teysm.) and the role of unreduced gametes in determining chromosome number and fertility were investigated. Two 24-chromosome interspecific hybrids were used as parents, 'Tangeglow' and 1 7851-1'. The F 1 offspring from this cross had chromosome numbers ranging from 28 to 36. Because 'Tangeglow' is seed-propagated and has normal meiosis, '7851-1' must have produced some male gametes that were incompletely unreduced and other gametes that were completely unreduced. The female fertility of interspecific hybrids with 36 chromosomes and 29 chromosomes was compared. The hybrids with 36 chromosomes exhibited greater fertility than the hybrids with 29 chromosomes. These results indicate that completely unreduced gametes provide for greater female fertility in the hybrid progeny because of the pre sence of complete genomes of Java and New Guinea Impatiens.

show abstract

Flower Color Inheritance in Inbred Progenies of Impatiens Interspecific Hybrids

Cited by 7 publications

References 0 publications

Formation of Unreduced Pollen by an Impatiens Hawkeri × Platypetala Interspecific Hybrid

Formation of Unreduced Pollen by an Impatiens Hawkeri × Platypetala Interspecific Hybrid

Inter-sectional hybrids obtained from reciprocal crosses between <i>Begonia semperflorens</i> (section <i>Begonia</i>) and <i>B.</i> ‘Orange Rubra’ (section <i>Gaerdita</i> × section <i>Pritzelia</i>)

Fertility and chromosome number in interspecific Impatiens hybrids

Contact Info

Product

Resources

About