High-Yielding Ability of F1 Hybrid Rice Varieties “Hybrid Togo Series” in the Direct Seeding on Well-Drained Paddy Field in Temperate Regions

The F1 hybrid sterility in indica/japonica crosses is the major barrier in developing hybrid rice varieties between these two diverse germplasm. The sterility problem in japonica/indica hybrids can be overcome by using wide compatibility genes. The objective of this study was to identify wide compatibility varieties (WCVs) in some tropical japonica rice. Twenty five tropical japonica varieties as male parents were crossed with indica (IR64) and japonica (Akitakomachi) testers as female parents. The crosses were planted following a randomized complete block design with three replications. Varieties having average spikelet fertility of more than 70% with both the indica and japonica testers were rated as WCVs. Result from this study showed that six tropical japonica varieties were classified as WCVs, i.e., Cabacu, Grogol, Kencana Bali, Klemas, Lampung Lawer, and Napa. Hybrid sterility is caused by partial sterility of male and female gametes. The WCVs from the present study can be used in hybrid rice breeding program to solve hybrid sterility in indica/japonica hybrids.

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High-Yielding Performance of Paddy Rice Achieved in Yunnan Province, China. I. High yielding ability of Japonica F1 hybrid rice, Yu-Za 29.

Japanese Journal of Crop Science ◽

10.1626/jcs.65.16 ◽

1996 ◽

Vol 65 (1) ◽

pp. 16-21 ◽

Cited By ~ 21

Author(s):

Takahisa AMANO ◽

Chang-Jun SHI ◽

De-Lin QIN ◽

Makoto TSUDA ◽

Yasuhiro MATSUMOTO

Keyword(s):

Yunnan Province ◽

Hybrid Rice ◽

Paddy Rice ◽

F1 Hybrid ◽

Yielding Ability

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IDENTIFICATION OF WIDE COMPATIBILITY VARIETIES IN SOME TROPICAL JAPONICA RICE

Indonesian Journal of Agricultural Science ◽

10.21082/ijas.v6n1.2005.28-31 ◽

2013 ◽

Vol 6 (1) ◽

pp. 28

Author(s):

A. Hairmansis ◽

Hajrial Aswidinnoor ◽

Trikoesoemaningtyas Trikoesoemaningtyas ◽

Suwarno Suwarno

Keyword(s):

Hybrid Rice ◽

Block Design ◽

Hybrid Sterility ◽

Japonica Rice ◽

Rice Varieties ◽

Major Barrier ◽

F1 Hybrid ◽

Tropical Japonica ◽

Wide Compatibility ◽

Randomized Complete Block Design

The F1 hybrid sterility in indica/japonica crosses is the major barrier in developing hybrid rice varieties between these two diverse germplasm. The sterility problem in japonica/indica hybrids can be overcome by using wide compatibility genes. The objective of this study was to identify wide compatibility varieties (WCVs) in some tropical japonica rice. Twenty five tropical japonica varieties as male parents were crossed with indica (IR64) and japonica (Akitakomachi) testers as female parents. The crosses were planted following a randomized complete block design with three replications. Varieties having average spikelet fertility of more than 70% with both the indica and japonica testers were rated as WCVs. Result from this study showed that six tropical japonica varieties were classified as WCVs, i.e., Cabacu, Grogol, Kencana Bali, Klemas, Lampung Lawer, and Napa. Hybrid sterility is caused by partial sterility of male and female gametes. The WCVs from the present study can be used in hybrid rice breeding program to solve hybrid sterility in indica/japonica hybrids.

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Genotypic Variation in Nutrient Uptake Requirements of Rice Using the QUEFTS Model

Agronomy ◽

10.3390/agronomy11010026 ◽

2020 ◽

Vol 11 (1) ◽

pp. 26

Author(s):

Tao Sun ◽

Xin Yang ◽

Sheng Tang ◽

Kefeng Han ◽

Ping He ◽

...

Keyword(s):

Nutrient Uptake ◽

Field Experiments ◽

Hybrid Rice ◽

Genotypic Variation ◽

Tropical Soils ◽

Study Data ◽

Japonica Rice ◽

Rice Varieties ◽

Indica Hybrid Rice ◽

Validation Experiments

Nutrient requirements for single-season rice using the quantitative evaluation of the fertility of tropical soils (QUEFTS) model in China have been estimated in a previous study, which involved all the rice varieties; however, it is unclear whether a similar result can be obtained for different rice varieties. In this study, data were collected from field experiments conducted from 2016 to 2019 in Zhejiang Province, China. The dataset was separated into two parts: japonica/indica hybrid rice and japonica rice. To produce 1000 kg of grain, 13.5 kg N, 3.6 kg P, and 20.4 kg K were required in the above-ground plant dry matter for japonica/indica hybrid rice, and the corresponding internal efficiencies (IEs) were 74.0 kg grain per kg N, 279.1 kg grain per kg P, and 49.1 kg grain per kg K. For japonica rice, 17.6 kg N, 4.1 kg P, and 23.0 kg K were required to produce 1000 kg of grain, and the corresponding IEs were 56.8 kg grain per kg N, 244.6 kg grain per kg P, and 43.5 kg grain per kg K. Field validation experiments indicated that the QUEFTS model could be used to estimate nutrient uptake of different rice varieties. We suggest that variety should be taken into consideration when estimating nutrient uptake for rice using the QUEFTS model, which would improve this model.

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Effect of hybrid rice varieties on growth and development of broilers and ducks

Animal Nutrition ◽

10.1016/j.aninu.2020.06.004 ◽

2020 ◽

Author(s):

Frederick M. LeMieux ◽

Courtney P. Villemarette ◽

Eddie K. Lyons ◽

Thomas H. Shields ◽

Norman German

Keyword(s):

Growth And Development ◽

Hybrid Rice ◽

Rice Varieties

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Grain Yield of Hybrid Rice Varieties as Influenced by Seed Rates under Aerobic Direct Seeded Situation

International Journal of Current Microbiology and Applied Sciences ◽

10.20546/ijcmas.2018.710.330 ◽

2018 ◽

Vol 7 (10) ◽

pp. 2839-2845

Author(s):

K. Jana ◽

K. Mondal ◽

S. Banerjee ◽

S. Goswami ◽

R. Mandal ◽

...

Keyword(s):

Grain Yield ◽

Hybrid Rice ◽

Rice Varieties ◽

Direct Seeded

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Divergent selection and genetic introgression shape the genome landscape of heterosis in hybrid rice

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.1919086117 ◽

2020 ◽

Vol 117 (9) ◽

pp. 4623-4631 ◽

Cited By ~ 2

Author(s):

Zechuan Lin ◽

Peng Qin ◽

Xuanwen Zhang ◽

Chenjian Fu ◽

Hanchao Deng ◽

...

Keyword(s):

Hybrid Rice ◽

Field Trials ◽

Hybrid Breeding ◽

Genetic Introgression ◽

Rice Varieties ◽

Rice Landraces ◽

Rice Hybrid ◽

Negative Effect ◽

Two Populations ◽

Positive Effect

The successful application of heterosis in hybrid rice has dramatically improved rice productivity, but the genetic mechanism for heterosis in the hybrid rice remains unclear. In this study, we generated two populations of rice F1hybrids with present-day commercial hybrid parents, genotyped the parents with 50k SNP chip and genome resequencing, and recorded the phenotype of ∼2,000 hybrids at three field trials. By integrating these data with the collected genotypes of ∼4,200 rice landraces and improved varieties that were reported previously, we found that the male and female parents have different levels of genome introgressions from other rice subpopulations, includingindica,aus, andjaponica, therefore shaping heterotic loci in the hybrids. Among the introgressed exogenous genome, we found that heterotic loci, includingGhd8/DTH8,Gn1a, andIPA1existed in wild rice, but were significantly divergently selected among the rice subpopulations, suggesting these loci were subject to environmental adaptation. During modern rice hybrid breeding, heterotic loci were further selected by removing loci with negative effect and fixing loci with positive effect and pyramid breeding. Our results provide insight into the genetic basis underlying the heterosis of elite hybrid rice varieties, which could facilitate a better understanding of heterosis and rice hybrid breeding.

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