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Breeding for Three‐line System Hybrid Rice. To expedite the spread of technical expertise on hybrid rice, a four-month specialized training course on hybrid rice seed production was conducted during the 1998 wet season for 22 Department of Agriculture and NGO trainers from the regions that had been selected for hybrid rice cultivation and seed production. At present, Yuan's team has nine third-generation hybrid rice combinations under trial, which are expected to achieve commercial seed production in the following three to four years. Here, we report the development of a mechanized hybrid rice seed production method using … In addition, the high cost of hybrid seed production hinders the application of heterosis in many crops. 19 . This has led to speculation regarding the production of hybrid rice by utilising cytoplasmic male sterility. "The third-generation hybrid rice has the comprehensive strength to promote a greener and more sustainable development of China's rice production with higher quality and yield," Yuan said. be revolutionary for agriculture by allowing self -propagation of F. 1. hybrids. At present, the mechanization of hybrid rice seed production, especially in mixed seed production, has not been able to achieve large-scale commercial appli-cations in production. Here we show that heterozygosity of F. 1. hybrid rice can be fixed and thus . The increase in production is 15-20% higher than the best commercial inbred rice, with a planting area reached more than 50% of the total area (You et al. Nuclear male sterility is common in flowering plants, but its application in hybrid breeding and seed production is limited because of the inability to propagate a pure male sterile line for commercial hybrid seed production. Production of hybrid rice seeds is also more expensive compared to inbred rice: according to industry estimates to produce 1 kg of hybrid rice seeds costs Rp 15,057 while it costs only Rp 1,766 to produce 1 kg of inbred rice seeds (Corteva, 2019).-+--+--- + --+ -) and and and . Most japonica rice has normal cytoplasm, but indica varieties with sterile cytoplasm and fertility restoring system have been identified. Untapped potential in crop production is held back by weak infrastructure, underdeveloped technology and use of machinery, a lack of available credit and poor field management and agricultural practices. 20 . In the initial years (1976-86) of. 1.5 and 2.0 t ha –1. 2000 1500 1000 500 0 1978 1980 1982 1984 1988 1990 1992 1994 1998 2000 1976 1986 1996 2002. Heterosis in Rice. Clonal reproduction through seeds could . While the hybrid system is a disadvantage to farmers in terms of mandatory seed purchase, it serves as a motivation and opportunity for private seed companies to recoup their investment and therefore encourages their involvement in seed production research and development. Manipulation of GA status either by genetic alteration or by exogenous application of GA or GA biosynthesis inhibitors are common strategies used to optimize plant growth and crop yields. 200 150 100 50 0. that only a limited amount of hybrid rice seeds can be grown. 2006). Hybrid Rice Seed Production Hybrid vigour in rice has been first reported by Jones (1926). Development. application of heterosis in many crops. In this method, three closely linked gene expression cassettes were … The purity of hybrid rice seeds used in commercial production must be more than 98%. Good crop management is necessary for raising a hybrid –rice seed production crop. In this sys- tem, female sterile restorers can pollinate male sterile lines to produce hybrid seeds. a. While the Vietnamese government portrays hybrid rice as a national success, from what we saw, the actual result is a big export market for China's emerging seed and pesticide industry. One of the most important factors affecting hybrid rice application is to provide sufficient, high-quality, and affordable hybrid rice seeds to farmers. RESULTS: Here, we report the development of a mechanized hybrid rice seed production method using a female sterile rice. Hybrid rice technology originated from China and is well commercialized in Asia and the Americas. Here we show that heterozygosity of F1 hybrid rice can be fixed and thus propagated without additional crossing. 2010 to 2015 Nanchang, China. HRDC-JAAS Hybrid Rice Breeding and Seed Production Training. Hybrid Rice Seed Production Technology in hindi.mp4 - Duration: 7:56. naiprkmp 80,623 views. 3,4. Almost 80% of hybrid rice seed is still imported from China, costing Vietnam about $14.5 million per year. Furthermore, hybrid rice seed production system used by farmers in China improved the rice output potential by nearly 15 % to 20%. 3. The main problems about research and application of two-line hybrid rice were reviewed, including the confusing nomenclature and male sterile lines classification, the unclear characteristics of photoperiod and temperature responses and the unsuitable site selection for male sterile line and hybrid rice seed production.

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