Segregation Distortion Observed in the Progeny of Crosses Between Oryza sativa and O. meridionalis Caused by Abortion During Seed Development

Toyomoto, Daiki; Uemura, Masato; Taura, Satoru; Satô, Tadashi; Henry, Robert J.; Ishikawa, Ryuji; Ichitani, Katsuyuki

doi:10.3390/plants8100398

Cited by 10 publications

(28 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For preliminary linkage analysis using the cross between Koshihikari and XM6, we used 108 published SSR and Indel markers developed by Busungu et al (2016) , Chen et al (1997) , Ichitani et al (2011) , IRGSP (2005) , McCouch et al (2002) , Monna et al (2006) , Panaud et al (1996) , Shen et al (2004) , Temnykh et al (2000) , Toyomoto et al (2019) , and Rice Genome Research Program ( ) ( Table 2 , Supplemental Table 1 ).…”

Section: Methodsmentioning

confidence: 99%

Linkage analysis of rice bacterial blight resistance gene <i>xa20</i> in XM6, a mutant line from IR24

et al. 2021

Self Cite

View full text Add to dashboard Cite

Bacterial blight caused by Xanthomonas oryzae pv. oryzae ( Xoo ) is an important disease constraining rice ( Oryza sativa L.) production worldwide. The XM6 line was induced by N-methyl-N-nitrosourea from IR24, an Indica cultivar that is susceptible to Philippine and Japanese Xoo races. XM6 was confirmed to carry a recessive gene named xa20 , resistant to six Philippine and five Japanese Xoo races. The chromosomal gene location was found using 10 plants with the shortest lesion length in an F 2 population consisting of 298 plants from a susceptible Japonica variety Koshihikari × XM6. Analysis using PCR-based DNA markers covering the whole rice genome indicated the gene as located on the distal region of the long arm of chromosome 3. The IKC3 line carries IR24 genetic background with Koshihikari fragment on chromosome 3 where a resistance gene was thought to be located. The F 2 population from IKC3 × XM6 clearly showed a bimodal distribution separating resistant and susceptible plants. Further linkage analysis conducted using this F 2 population revealed that xa20 is located within the 0.8 cM region flanked by DNA markers KIC3-33.88 (33.0 Mb) and KIC3-34.06 (33.2 Mb). This study yields important findings for resistance breeding and for the genetic mechanism of Xoo resistance.

show abstract

Section: Methodsmentioning

confidence: 99%

Linkage analysis of rice bacterial blight resistance gene <i>xa20</i> in XM6, a mutant line from IR24

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Li et al [ 23 ] identified five hybrid pollen sterility genes, all of which follow the pollen-killer model [ 15 , 16 ]. No genes conferring hybrid seed sterility have been reported in the cross between O. meridionalis and the other AA genome species before our recent study [ 24 ], in which we reported seed abortion after fertilization in the progeny from the cross between O. sativa and O. meridionalis was controlled by a SEED DEVELOPMENT 1 ( SDV1 ) gene and a SEED DEVELOPMENT 2 ( SDV2 ) gene. This gene model is not an egg-killer model but a duplication and loss of a functional gene for seed development—a new finding in rice genetics.…”

Section: Introductionmentioning

confidence: 72%

New Hybrid Spikelet Sterility Gene Found in Interspecific Cross between Oryza sativa and O. meridionalis

Ichitani

Toyomoto

Uemura

et al. 2022

Plants

Self Cite

View full text Add to dashboard Cite

Various kinds of reproductive barriers have been reported in intraspecific and interspecific crosses between the AA genome Oryza species, to which Asian rice (O. sativa) and African rice (O. glaberrima) belong. A hybrid seed sterility phenomenon was found in the progeny of the cross between O. sativa and O. meridionalis, which is found in Northern Australia and Indonesia and has diverged from the other AA genome species. This phenomenon could be explained by an egg-killer model. Linkage analysis using DNA markers showed that the causal gene was located on the distal end of chromosome 1. Because no known egg-killer gene was located in that chromosomal region, this gene was named HYBRID SPIKELET STERILITY 57 (abbreviated form, S57). In heterozygotes, the eggs carrying the sativa allele are killed, causing semi-sterility. This killer system works incompletely: some eggs carrying the sativa allele survive and can be fertilized. The distribution of alleles in wild populations of O. meridionalis was discussed from the perspective of genetic differentiation of populations.

show abstract

“…Several markers deviated from expected Mendelian ratios were observed (Figure S1). Segregation distortion might be caused by several reproductive isolation mechanisms [56,57]. Therefore, some reproductive isolation mechanisms might exist between N. debneyi and N. fragrans.…”

Section: Discussionmentioning

confidence: 99%

Genetic Mapping of the HLA1 Locus Causing Hybrid Lethality in Nicotiana Interspecific Hybrids

Tezuka

Kitamura

Imagawa

et al. 2021

Plants

View full text Add to dashboard Cite

Hybrid lethality, a postzygotic mechanism of reproductive isolation, is a phenomenon that causes the death of F1 hybrid seedlings. Hybrid lethality is generally caused by the epistatic interaction of two or more loci. In the genus Nicotiana, N. debneyi has the dominant allele Hla1-1 at the HLA1 locus that causes hybrid lethality in F1 hybrid seedlings by interaction with N. tabacum allele(s). Here, we mapped the HLA1 locus using the F2 population segregating for the Hla1-1 allele derived from the interspecific cross between N. debneyi and N. fragrans. To map HLA1, several DNA markers including random amplified polymorphic DNA, amplified fragment length polymorphism, and simple sequence repeat markers, were used. Additionally, DNA markers were developed based on disease resistance gene homologs identified from the genome sequence of N. benthamiana. Linkage analysis revealed that HLA1 was located between two cleaved amplified polymorphic sequence markers Nb14-CAPS and NbRGH1-CAPS at a distance of 10.8 and 10.9 cM, respectively. The distance between these markers was equivalent to a 682 kb interval in the genome sequence of N. benthamiana.

show abstract

Segregation Distortion Observed in the Progeny of Crosses Between Oryza sativa and O. meridionalis Caused by Abortion During Seed Development

Cited by 10 publications

References 54 publications

Linkage analysis of rice bacterial blight resistance gene <i>xa20</i> in XM6, a mutant line from IR24

Linkage analysis of rice bacterial blight resistance gene <i>xa20</i> in XM6, a mutant line from IR24

New Hybrid Spikelet Sterility Gene Found in Interspecific Cross between Oryza sativa and O. meridionalis

Genetic Mapping of the HLA1 Locus Causing Hybrid Lethality in Nicotiana Interspecific Hybrids

Contact Info

Product

Resources

About