The high level of wide-compatibility of variety ‘Dular’ has a complex genetic basis

Wang, J.; Liu, K. D.; Xu, Caiguo; Li, X. H.; Zhang, Qifa

doi:10.1007/s001220050910

Cited by 76 publications

(54 citation statements)

References 13 publications

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“…We have previously demonstrated that epistasis at multiple loci causes female sterility in the hybrid progeny of rice (Kubo and Yoshimura, 2005). Together with the previous results of rice QTL analyses (Wu et al, 1995;Wang et al, 1998), these studies imply that complex gene interaction at multiple loci is the universal nature of gametogenesis, functioning as the postzygotic reproductive barriers that drive new-species evolution. Our observations also propose that diverse alleles at epistatic loci could bring about variable epistatic effects for sterility contributing to phenotypic variation for sterility in the hybrid progeny.…”

Section: Discussionsupporting

confidence: 58%

“…Recently, Zhao et al (2007) reported S31, a new locus for female sterility at the same position of chromosome 5. The phenotypic effects of these sterility factors were quite different from S24 as they affect seed fertility (Wu et al, 1995;Li et al, 1997;Wang et al, 1998) and S31 specifically affects female gametes but not male gametes (Zhao et al, 2007). On the other hand, neither female gametes nor seed fertility appeared to be affected by a single effect of S24 gene in our own analysis.…”

Section: Discussionmentioning

confidence: 52%

“…Previous QTL studies of hybrid sterility showed that a QTL for seed sterility was detected on the short arm of chromosome 5 in the different indica/japonica cross combinations (Wu et al, 1995;Li et al, 1997;Wang et al, 1998). Recently, Zhao et al (2007) reported S31, a new locus for female sterility at the same position of chromosome 5.…”

Section: Discussionmentioning

confidence: 99%

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A novel epistatic interaction at two loci causing hybrid male sterility in an inter-subspecific cross of rice (Oryza sativa L.)

et al. 2008

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Postzygotic reproductive isolation (RI) often arises in inter-subspecific crosses as well as inter-specific crosses of rice (Oryza sativa L.). To further understand the genetic architecture of the postzygotic RI, we analyzed genes causing hybrid sterility and hybrid breakdown in a rice inter-subspecific cross. Here we report hybrid male sterility caused by epistatic interaction between two novel genes, S24 and S35, which were identified on rice chromosomes 5 and 1, respectively. Genetic analysis using near-isogenic lines (NILs) carrying IR24 (ssp. indica) segments with Asominori (ssp. japonica) genetic background revealed a complicated aspect of the epistasis. Allelic interaction at the S24 locus in the heterozygous plants caused abortion of male gametes carrying the Asominori allele (S24-as) independent of the S35 genotype. On the other hand, male gametes carrying the Asominori allele at the S35 locus (S35-as) showed abortion only when the IR24 allele at the S24 locus (S24-ir) was concurrently introgressed into the S35 heterozygous plants, indicating that the sterility phenotype due to S35 was dependent on the S24 genotype through negative epistasis between S24-ir and S35-as alleles. Due to the interaction between S24 and S35, self-pollination of the double heterozygous plants produced pollen-sterile progeny carrying the S24-ir/ S24-ir S35-as/S35-ir genotype in addition to the S24 heterozygous plants. This result suggests that the S35 gene might function as a modifier of S24. This study presents strong evidence for the importance of epistatic interaction as a part of the genetic architecture of hybrid sterility in rice. In addition, it suggests that diverse systems have been developed as postzygotic RI mechanisms within the rice.

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Section: Discussionsupporting

confidence: 58%

Section: Discussionmentioning

confidence: 52%

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A novel epistatic interaction at two loci causing hybrid male sterility in an inter-subspecific cross of rice (Oryza sativa L.)

et al. 2008

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“…Thus, hybrid sterility in different varietal combinations may be explained by allelic interaction at different loci. In some hybrids, allelic interaction at two or more loci caused hybrid sterility (Wan et al 1993, Wang et al 1998. It is, therefore, necessary to adopt a genome-wide approach to determine the number and location of the loci that may significantly influence hybrid fertility.…”

Section: Discussionmentioning

confidence: 99%

The Origin of Weedy Rice Ludao in China Deduced by Genome Wide Analysis of Its Hybrid Sterility Genes

et al. 2005

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The authors report here a case of hybrid sterility between an indica cultivar, IR36 and a weedy strain, Ludao, which naturally grows in and around farms in Jiangsu province, China. A genome-wide analysis was performed with a backcross population of IR36/Ludao//IR36 using a total of 151 simple sequence repeat (SSR) markers covering the entire rice linkage map. As a result, two loci were found to induce independently the hybrid sterility via female gamete abortion. Of the two loci, the locus on chromosome 6 corresponded to S10 according to its chromosomal location, while the other one on chromosome 7 was different from all the previously reported hybrid sterility loci, and was designated as S30(t). Based on the allelic interaction which causes female gamete abortion, two alleles were identified: S30(t)-i in IR36 and S30(t)-j in Ludao. In the heterozygote, S30(t)-i/S30(t)-j, which was semi-sterile, female gametes carrying S30(t)-j were partially aborted. A javanica variety, Ketan Nangka, and an Aus variety, N22, carried the neutral allele, S30(t)-n. Thus, Ludao was found to harbor a hybrid sterility gene different from that of existing cultivars in China, as an evidence of its origin from an ancient wild rice variety.

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“…Significant progress in rice functional genomics is being made since the completion of the international rice genome sequencing project (Chen et al, 2011) which offers tremendous opportunities for breeders to improve this important crop by molecular breeding. Many molecular and genetic analyses have been performed on rice different traits such as: heading date (Izawa et al, 2003;Izawa, 2007;Shibaya et al, 2011), spikelet sterility (Ikehashi and Araki, 1986;Sawamura and Sano, 1996;Zhang and Lu, 1996;Wan et al, 1998;Wang et al, 1998;Yan et al, 2000;Ji et al, 2005;Zhao et al, 2006;Zhang et al, 2011), leaf size Shen et al, 2003;Kobayashi et al, 2006;Yue et al, 2006;Tong et al, 2007;Farooq et al, 2010) and yield components traits Erik et al, 2002;Ishimaru, 2003;Thomson et al, 2003;Yoon et al, 2006).…”

Section:  Non-conventional Approachesmentioning

confidence: 99%

Genetic Improvement of Rice (Oryza sativa) For Salt Tolerance: A Review

2017

International Journal of Advanced Research in Botany

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The high level of wide-compatibility of variety ‘Dular’ has a complex genetic basis

Cited by 76 publications

References 13 publications

A novel epistatic interaction at two loci causing hybrid male sterility in an inter-subspecific cross of rice (Oryza sativa L.)

A novel epistatic interaction at two loci causing hybrid male sterility in an inter-subspecific cross of rice (Oryza sativa L.)

The Origin of Weedy Rice Ludao in China Deduced by Genome Wide Analysis of Its Hybrid Sterility Genes

Genetic Improvement of Rice (Oryza sativa) For Salt Tolerance: A Review

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