Megasporogenesis and Megagametogenesis in Autotetraploid Indica/Japonica Rice Hybrid

Hu, Chao-Yue; Zeng, Yuanyuan; Guo, Haibin; Lu, Yue; Chen, Zhixiong; Shahid, Muhammad Qasim; Liu, Xiangdong

doi:10.1016/s1672-6308(09)60030-5

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…Poor fertility is the main barrier for utilizing heterosis between the two rice (O. sativa L.) subspecies, indica and japonica and the development of autotetraploid hybrids (2n = 4x = 48) has been advised as a new method for increasing heterosis in hybrid rice Ghaleb et al, 2020;Rao et al, 2022). An autotetraploid indica/japonica hybrid combines the advantages of polyploidy and heterosis between indica and japonica (Hu et al, 2010;Yu et al, 2021a;Huang and Huang, 2022;Rao et al, 2022) and realized to have great potential to increase the yield of rice Ghouri et al, 2019;Chen et al, 2021;Ku et al, 2022). Furthermore, autotetraploid indica/japonica hybrids hold more nutrition value than diploid rice (Zhiyong et al, 1987 andChen et al, 2021Ghouri et al, 2023) and therefore said to have stronger potential vigor in rice breeding than diploid rice does (Shahid et al, 2011;Rout et al, 2020;.…”

Section: Introductionmentioning

confidence: 99%

Sequencing of S5 gene in autotetraploid rice japonica and indica to overcome F1 hybrids embryo sac sterility

Fimanekeni,

Nabieu,

Xiang-Dong

2023

Int. J. Genet. Mol. Biol.

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Autotetraploid rice is a new germplasm developed through diploid chromosome doubling. Hybrids developed by indica autotetraploid rice crossed by japonica autotetraploid rice has clear biological advantage on F 1 , causing widespread concerns for special research evolution to evaluate and utilize F 1 hybrid vigor. However, the widespread fertility of F 1 indica and japonica autotetraploid rice is low, which makes it difficult to direct utilization of F 1 vigor. In diploid indica and japonica rice, the fertility of F 1 hybrids is also proved to be low. Embryo sac infertility is known to be one of the most important reasons for hybrid sterility and many studies has indicated that the primary cause of F1 sterility was abortion of the embryo sac, which was identified by the genotype of the S5 gene on the chromosome. Previous studies have cloned S 5 based on common wild rice and cultivated rice and S 5 sequence was obtained and studied. In this paper, typical sequence of different materials of S 5 japonica and indica rice group of autotetraploid hybrids observed with whole-mount eosin B-staining confocal laser scanning microscopy WE-CLSM was utilized, to overcome F 1 hybrids embryo sac sterility.

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Section: Introductionmentioning

confidence: 99%

Sequencing of S5 gene in autotetraploid rice japonica and indica to overcome F1 hybrids embryo sac sterility

Fimanekeni,

Nabieu,

Xiang-Dong

2023

Int. J. Genet. Mol. Biol.

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“…However, Low seed set is the major barrier in autotetraploid rice breeding (He et al, 2011a;Shahid et al, 2013a). There are many reasons for low seed setting of autotetraploid rice, such as pollen and embryo sac abortion (Huang et al, 1999;Zhang et al, 2003;Guo et al, 2006;Hu et al, 2010;Shahid et al, 2010), abnormal chromosome behavior and microtubule distribution pattern, and differentially expressed genes and miRNAs (He et al, 2011a,b;Wu et al, 2014Wu et al, , 2015Li et al, 2016). Indicajaponica autotetraploid rice hybrids have shown strong yield potential, which would provide a new way to the rice breeding (Shahid et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Agronomic Traits and Cytogenetic Evaluation of Newly Developed Autotetraploid Rice Line

Guo¹,

Shahid²,

Zhao³

et al. 2016

PAKJAS

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Autotetraploid rice is an important germplasm and has a great scope to increase rice yield but low seed set is a major encumbrance in its utilization. The present study was planned to observe the cytogenetic and agronomic characteristics of newly developed highly fertile autotetraploid rice line (1162). Agronomic traits, male and female gametophytes of newly developed autotetraploid rice (1162) and their hybrids showed better performance as compared to its parents and other autotetraploid rice lines. The mean of panicle length, number of grains per panicle, filled grains per panicle, 1000-grain weight, grain length, grain width, and seed set were 25.04cm, 103.38 grains, 83.56 grains, 43.44g, 9.54mm, 4.04mm and 81.58%, respectively. The meiotic analysis showed that the mean meiotic configurations of 1162 at diakinesis were (0.13±0.05) I + (4.89±0.26) II +(0.02±0.00) III +(9.45±0.13) IV. The frequency of trivalent and univalent in new line was lower than the autotetraploid lines (control) at diakinesis and metaphase I, and the configuration of chromosome in 1162 was more symmetrical, which was in favor of 2/2 segregation of homologous chromosome, although higher number of quadrivalents were found than parents. Heterosis of hybrids crossed with 1162 was not only positive but also attained highly significant levels for important quantitative traits. The results showed that high fertility can be inherited and have important applications and research value.

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Characterization and evaluation of putative polyploid progenies of guava (Psidium guajava L.) through flow cytometry

Kumar¹,

Sankaran²,

Dinesh³

et al. 2022

Fruits

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Megasporogenesis and Megagametogenesis in Autotetraploid Indica/Japonica Rice Hybrid

Cited by 3 publications

References 6 publications

Sequencing of S5 gene in autotetraploid rice japonica and indica to overcome F1 hybrids embryo sac sterility

Sequencing of S5 gene in autotetraploid rice japonica and indica to overcome F1 hybrids embryo sac sterility

Agronomic Traits and Cytogenetic Evaluation of Newly Developed Autotetraploid Rice Line

Characterization and evaluation of putative polyploid progenies of guava (Psidium guajava L.) through flow cytometry

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