THE GENETIC BASIS OF CROSSING BARRIERS BETWEEN<i>ORYZA PERENNIS</i>SUBSP.<i>BARTHII</i>AND ITS RELATED TAXA

Chu, Yaw-En; Oka, Hiko-Ichi

doi:10.1111/j.1558-5646.1970.tb01746.x

Cited by 28 publications

(8 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These suggest that O. barthii is unlikely to have evolved from O. longistaminata. Furthermore, although O. longistaminata and O. barthii are sympatric in Africa, interspecific introgression does not frequently occur between the two species, as has previously been observed (Chu and Oka, 1970). O. longistaminata is supposed to be one of the two earliest diverged species, whereas O. barthii is one of the two latest diverged species, as described above, indicating that the period of the divergence between the two species may be long enough to enable a relatively strict crossing barrier to be developed between the two species.…”

Section: Discussionmentioning

confidence: 73%

“…O. meridionalis , the wild rice species in Australia, is annual, whereas O. glumaepatula , the Latin American relative, varies in perenniality. Various levels of hybrid sterility have been observed in interspecific crossings among these species (Chu et al, 1969b;Morishima, 1969;Chu and Oka, 1970;Naredo et al, 1998), which resulted in a reproductive isolation mechanism among species.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evolutionary relationships among rice species with AA genome based on SINE insertion analysis.

et al. 2002

View full text Add to dashboard Cite

Previous studies based on morphological and molecular markers indicated that there are two cultivated and five wild rice species within the Oryza genus with the AA genome. In the cultivated rice species, Oryza sativa , a retroposon named p-SINE1 has been identified. Some of the p-SINE1 members characterized previously showed interspecific insertion polymorphisms in the species with the AA genome. In this study, we identified new p-SINE1 members showing interspecific insertion polymorphisms from representative strains of four wild rice species with the AA genome: O. barthii , O. glumaepatula , O. longistaminata , and O. meridionalis . Some of these members were present only in strains of one species, whereas the others were present in strains of two or more species. The p-SINE1 insertion patterns in the strains of the Asian and African cultivated rice species O. sativa and O. glaberrima were very similar to those of the Asian and African wild rice species O. rufipogon and O. barthii , respectively. This is consistent with the previous hypothesis that O. sativa and O. glaberrima are derived from specific wild rice species. Phylogenetic analysis based on the p-SINE1 insertion patterns showed that the strains of each of the five wild rice species formed a cluster. The strains of O. longistaminata appear to be distantly related to those of O. meridionalis . The strains of these two species appear to be distantly related to those of three other species, O. rufipogon , O. barthii and O. glumaepatula . The latter three species are closely related to one another with O. barthii and O. glumaepatula being most closely related. A phylogenetic tree including a hypothetical ancestor with all loci empty for p-SINE1 insertion showed that the strains of O. longistaminata are related most closely to the hypothetical ancestor. This indicates that O. longistaminata and O. meridionalis diverged early on, whereas the other species diverged relatively recently, and suggests that the Oryza genus with AA genome might have originated in Africa, rather than in Asia.

show abstract

Section: Discussionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Evolutionary relationships among rice species with AA genome based on SINE insertion analysis.

et al. 2002

View full text Add to dashboard Cite

show abstract

“…A possible way to study this would be the model developed by Chu & Oka (1970) and Ghesquiere (1988) to explain the failure of endosperm development in F1 hybrids of crosses between 0. sativa and the wild species 0. longistaminata. This model is based on an unfavourable allelic dosage of two genes in the endosperm.…”

Section: Discussionmentioning

confidence: 99%

Abnormal segregations in crosses between two cultivated rice species

Pham¹,

Bougerol²

1993

Heredity

View full text Add to dashboard Cite

An F1 hybrid between the two cultivated rice species Oryza glaberrima and 0. sativa spp. japonica was pollinated by four different 0. sativa genotypes to obtain four back-cross progenies with 9-36 plants each. These progenies were followed for genetic marker segregations. Segregation distortions were demonstrated at several loci. Preferential allele associations were detected. Some distortions could be explained by the sterility of the female gametes of the F1 hybrid caused by a sporogametophytic interaction gene, while an early differential zygotic selection could be the origin of the other distortions.

show abstract

“…Indeed, some strains of O. glumaepatula are similar to O. rufipogon in morphological characters (Tateoka 1962; Morishima 1969; Vaughan 1994) as well as in molecular markers (Cordesse et al 1990; Dally & Second 1990; Second & Wang 1992; Wang et al 1992). However, F 1 hybrids between this American taxon and other AA genome species distributed in other continents generally showed high pollen sterility (Hinata & Oka 1962; Chu et al 1969; Morishima 1969; Chu & Oka 1970).…”

Section: Introductionmentioning

confidence: 85%

Population genetic structure of wild rice Oryza glumaepatula distributed in the Amazon flood area influenced by its life‐history traits

1998

View full text Add to dashboard Cite

Wild plant species develop their own way of living to adapt to the specific environment of their habitats. Their life‐history traits strongly affect the genetic structure of the population. The wild species Oryza glumaepatula Steud. growing in the Amazon basin seems to have characteristic life‐history traits suited for the flood condition. At the vegetative growth stage, the culms frequently break at internodes. With no roots anchoring on the ground, plant bodies floating in the water move downriver by water current and wind. To examine the association between the life‐history traits and genetic population structure of Amazonian O. glumaepatula, we analysed allozyme variability at 29 loci of 16 enzymes using 37 populations from five regions. Allozymes were not so variable (total gene diversity HE = 0.044) compared with Asian wild rice, O. rufipogon Griff. The bottleneck effect and rare opportunity of interspecies gene flow may prevent the development of allozyme variability. Population genotypes tended to be differentiated among geographically isolated regions. Observed heterozygosities were much lower than expected heterozygosities, or gene diversity (HO = 0.003 for whole population) and FIS over polymorphic loci was 0.931, indicating that O. glumaepatula has developed an inbreeding system. But, the intrapopulation gene diversity (HS) was higher than interpopulation gene diversity (DST), as generally observed in outbreeding populations. The migration ability of O. glumaepatula makes long‐distance seed dispersal possible. This might have led to frequent gene flow among populations.

show abstract

THE GENETIC BASIS OF CROSSING BARRIERS BETWEENORYZA PERENNISSUBSP.BARTHIIAND ITS RELATED TAXA

Cited by 28 publications

References 20 publications

Evolutionary relationships among rice species with AA genome based on SINE insertion analysis.

Evolutionary relationships among rice species with AA genome based on SINE insertion analysis.

Abnormal segregations in crosses between two cultivated rice species

Population genetic structure of wild rice Oryza glumaepatula distributed in the Amazon flood area influenced by its life‐history traits

Contact Info

Product

Resources

About