Hybrid Rice Technology

Virmani, S. S.; Kumar, Ish

doi:10.1201/9781439822562.ch5

Cited by 13 publications

(21 citation statements)

References 37 publications

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“…Hybrid breeding exploits the increased vigour or heterosis of F 1 hybrid plants. Cytoplasmic male sterility, photoperiod-sensitive genic male sterility, and thermo-sensitive genic male sterility systems are all used for hybrid rice breeding ( Virmani and Kumar, 2009 ; Jeon et al , 2011 ). An alternative strategy for engineering male sterility has recently been developed by simply abolishing starch accumulation in maize pollen resulting from the expression of α-amylase ( Wu et al , 2016 ).…”

Section: Discussionmentioning

confidence: 99%

“…As such, manipulation of the starch content in pollen grains has provided a novel strategy of inducing male sterility ( Wu et al , 2016 ). Male sterile lines are used in hybrid seed production which is widely employed for the production of high yield ( Virmani and Kumar, 2009 ; Jeon et al , 2011 ; Wu et al , 2016 ). Despite its importance, little is known about the starch synthesis pathway in cereal pollen grains, an important heterotrophic organ essential for plant reproduction.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Plastidic phosphoglucomutase and ADP-glucose pyrophosphorylase mutants impair starch synthesis in rice pollen grains and cause male sterility

Lee¹,

Eom²,

Hwang³

et al. 2016

Journal of Experimental Botany

103

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plastidic phosphoglucomutase and ADP-glucose pyrophosphorylase mutants impair starch synthesis in rice pollen grains and cause male sterility

Lee¹,

Eom²,

Hwang³

et al. 2016

Journal of Experimental Botany

103

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“…), among them cytoplasm derived from wild rice (Oryza rufipogon Griff.) known as wild‐abortive cytoplasmic male sterility (WA‐CMS) has a sporophytic manner of inheritance (Virmani et al, 1998). Therefore, this type of CMS has wide application in the production of new CMS lines in hybrid rice breeding programs (Komori et al, 2003; Zhang et al, 2002a).…”

mentioning

confidence: 99%

Marker‐Assisted Backcrossing to Develop an Elite Cytoplasmic Male Sterility Line in Rice

et al. 2015

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Cytoplasmic male sterility (CMS) is a cornerstone of hybrid production in many crops. In three-line hybrid systems, use of CMS, maintainer, and fertility restorer lines is necessary for production of hybrid seeds. Limited resources of CMS and low variation of CMS lines cause genetic vulnerability to pathogens. Therefore, diversifying the CMS sources is indispensible for a sustainable production system of hybrid seed. In this study, we attempted for the first time to transfer CMS into maintainer line Yosen B in restricted generations using the marker-assisted backcrossing (MABC) method. The resultant F 1 hybrid of IR68897 A/Yosen B cross was backcrossed to Yosen B, and CMS plants in each backcross generation (from BC 1 F 1 to BC 3 F 1 ) were selected based on phenotyping test and MABC. Molecular assessment of backcross progenies was conducted using a mitochondrial CMS-specific marker and 34 polymorphic nuclear simple-sequence repeat (SSR) markers in early generations (from BC 1 F 1 to BC 2 F 1 ) and was continued using 9 additional SSRs and 82 inter-simple sequence repeat (ISSR) markers in BC 3 F 1 . A MABC strategy could successfully recover the recurrent parent genome (RPG) in BC 3 F 1 generation, and decreased heterozygosity of final CMS plants. Restorability test with known wild-abortive restorer lines (viz. IR36 and IR24) showed that combination of Yosen A  IR24 could produce highly fertile F 1 hybrid. Evaluation of some important agronomic traits of the final CMS line (BC 4 F 1 ) at field condition showed that it was comparable to the original maintainer fertile counterpart. Phenotypic and marker-assisted selections could considerably decrease the time needed for full recovery of RPG so that final CMS line could show a high similarity to original fertile counterpart.

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“…Pertumbuhan vegetatif yang lebih baik diharapkan akan mendukung tercapainya bobot hasil yang lebih tinggi, tetapi pertambahan tinggi tanaman saja tanpa disertai peningkatan karakter agronomi lain seperti jumlah anakan tidak dapat meningkatkan hasil. Kemampuan menyerbuk silang yang tinggi pada galur mandul jantan berpengaruh untuk menghasilkan benih yang tinggi pula (Virmani et al, 1998;Sahoo et.al., 1998). Persentase tertutupnya malai oleh pelepah daun bendera yang tinggi merupakan kelemahan dari galur mandul jantan.…”

Section: Hasil Dan Pembahasanunclassified

“…Salah satu karakter GMJ yang baik adalah mempunyai kemampuan menyerbuk silang yang tinggi (Virmani et al, 1998) yang tercermin dari tingginya pembentukan biji (seed set). Hasil penelitian menunjukkan bahwa perlakuan GA 3 dapat menurunkan jumlah gabah hampa pada tanamam GMJ HIPA 14 Penurunan jumlah gabah hampa ini secara langsung mempengaruhi persentase seed set tanaman GMJ dari HIPA 14.…”

Section: Hasil Dan Pembahasanunclassified

Pengujian Ga3 Dan Rasio Tanam Tetua Terhadap Produksi Benih Hibrida Hipa 14 Melalui Rancangan Petak Terbagi

Mulsanti¹

2017

Informatika Pertanian

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ABSTRAKMetode tiga galur yang dikembangkan untuk merakit padi hibrida di Indonesia mempunyai kelemahan dalam prosedur produksi benih yang rumit yang berakibat pada rendahnya hasil benih. Tingkat persilangan alami (outcrossing) yang rendah merupakan salah satu penyebab rendahnya hasil benih pada produksi benih hibrida. Aplikasi dosis GA3 dan pengaturan rasio tanam yang tepat diharapkan dapat meningkatkan produksi benih F 1 hibrida. Rancangan percobaan yang digunakan adalah rancangan petak terbagi (RPT) dengan tiga ulangan. Petak utama terdiri dari 3 dosis aplikasi GA 3 , yaitu: 0, 200 ppm dan 300 ppm. Rasio tanam terdiri dari 3 rasio tanam galur restorer (R): galur mandul jantan (GMJ), yaitu: 2R:8GMJ, 2R:12GMJ, dan 2R:16GMJ. Materi yang digunakan adalah tetua jantan dan betina varietas HIPA 14. Aplikasi GA 3 dapat meningkatkan tinggi tanaman pada GMJ dan galur restorer, jumlah anakan produktif per rumpun pada GMJ, tingkat eksersi malai, persentase eksersi stigma, dan tingkat persilangan alami pada produksi benih HIPA 14. Rasio tanam tetua hanya berpengaruh pada tinggi tanaman GMJ dan tidak mempengaruhi hasil benih varietas hibrida HIPA 14. Interaksi kedunya mampu meningkatkan tinggi tanaman pada GMJ dan R, tingkat eksersi malai, dan tingkat persilangan alami pada produksi benih HIPA 14.Kata kunci: Produksi benih, GA3, rasio tanam, padi hibrida ABSTRACTThe three lines method in hybrid rice formation has disadvantages in seed production procedure that result in low seed yield. Low levels of natural crosses (outcrossing) is one of the causes of low seed yield in hybrid seed production. GA 3 application and proper plant spacing, expected to improve F1 hybrid seed production. An experimentwas designed following the Split Plot design model with three replications. The main plot treatment was doses of GA 3 application consist of 0, 200 ppm and 300 ppm. The subplot treatment was plant row ratios of restores and CMS i.e., 2R:8A, 2R:12A; 2R:16A. The material used is parental lines of hybrid variety HIPA 14. The results showed that GA3 application was able to increase plant height of parental lines (CMS and restorer), number of productive tillers, exerted panicle and stigma also outcrossing rate at seed production of HIPA 14. The plant row ratio influenced the plant heigh of CMS lines. Interaction between GA 3 and plant row ratio increased plant height of parental lines, exerted panicle, and outcrossing rate.

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Hybrid Rice Technology

Cited by 13 publications

References 37 publications

Plastidic phosphoglucomutase and ADP-glucose pyrophosphorylase mutants impair starch synthesis in rice pollen grains and cause male sterility

Plastidic phosphoglucomutase and ADP-glucose pyrophosphorylase mutants impair starch synthesis in rice pollen grains and cause male sterility

Marker‐Assisted Backcrossing to Develop an Elite Cytoplasmic Male Sterility Line in Rice

Pengujian Ga3 Dan Rasio Tanam Tetua Terhadap Produksi Benih Hibrida Hipa 14 Melalui Rancangan Petak Terbagi

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