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Concurrent session III : Hybrid rice
Chairman : Dr. B.C.Viraktamath
Co chairman : Dr. M. Subramanian
Rapporteurs : Dr. S. Jebaraj, Dr. S.M. Ibrahim
Lecture 1 : "Hybrid rice development in and out side China" by Dr.C.X. Mao, China
Government support and nationwide cooperation for successful development in hybrids in China and outside China were outlined for the sustainable development to further increasing yield and growing area. Increasing seed yield by combining the biotechnology application to make more breakthroughs and revitalizing the cooperative spirit were highlighted. Dr. Mao felt that dedicating more obligations for hybrid rice global development is necessary and is of urgent need.
Lecture 2 : "Characterization of female sterile rice and its great potential" by
Dr. L.J. Chen, China
Dr. Chen explained that female gametophyte development along with female sterility play a critical role contributing directly to seed and grain production in rice.The Cyn mutation causing sporophytic female specific sterility in rice, characterization of cyn gene and how cyn gene application makes a break through in hybrid rice seed production technology for commercial utility were highlighted by Dr. Chen. This is a novel approach meriting attention.
Lecture 3 : "Hybrid rice research in India" by Dr. Hari Prasad, DRR
Dr.Prasad explained the need for Hybrids to be developed for wide range of environments, grain quality, need for long duration hybrids, for biotic resistance and hybrids for less water and salinity situations and to bring down the hybrid seed cost. Pusa RH 10 is the first aromatic hybrid and DRRH 3 and CORH 3 are of medium slender grain. Dr.Prasad informed that Indian hybrid consortium is on the anvil.
Lecture 4 : "Role of hybrid rice for sustainable food production" by Dr. Om Vir singh, Bayer Crop Science
Operation strategies like Hybrids for direct seeding for saving the duration and water, Mechanized transplanting and harvesting, monitoring adequate plant population and advising from seed to harvest were highlighted. Public Private partnership for development and promotion of rice hybrid seeds and no discrimination in procurement of hybrid rice grain with minimum support price offer were presented as the immediate need in rice farming.
Lecture 5 : "Genetic potential of thermosensitive genic male sterile lines in two line breeding of rice" by Dr. R. Latha
Dr.Latha presented the initiatives of PBS in TGMS research in rice. TNAU has started a dedicated TGMS Breeding Center in the year 1995 at Gudalur, Nilgiris with funds allotted by Tamil Nadu Government. TGMS lines TS 18 and TS 46 and the Two line hybrids TS 18 x CB 96026, TS 46 x BPI 76, TS 18 x MRST 9 and TS 18 x BPI 76 are found to be promising apart from yield with desirable grain and cooking quality
Lecture 6 : "Evolution of Hybrid rice in Tamil Nadu" by Dr. M. Rangasamy
The evolution of hybrid rice in TN particularly from TNAU started from 1979 onwards when genic male sterile line was identified and utilized to produce hybrids using stable line was presented in detail by Dr. Rangasamy. The components of super hybrid rice so that the yield can be increased to more than 20 t/ha and the importance to be bestowed on seed production in CORH 3 and CORH 4 so that these hybrids can be popularized in Tamil Nadu and possible Institutional tie-ups were explained. After getting CMS lines from China and the improved lines from IRRI, the first three line hybrid MGR (CORH 1) was released in 1993 – 1994. This is also the first Rice hybrid released in India.
X To motivate Public-Private-Partnership (PPP) in hybrid rice, rules have to be framed on MOU between Public and Private sector on exclusive basis for individual hybrid as case by case so that breeders can continuously concentrate on development of new hybrids.
X Application of biotechnology is advocated to make more breakthroughs in hybrid rice and revitalizing the cooperative spirit to increase seed yield.
X Dedicating more obligations on global development for hybrid rice is necessary
X Female gametophyte development along with female sterility is playing a critical role contributing directly to seed production in rice. The cyn mutation causing sporophytic female specific sterility in rice and characterization of cyn gene were presented. The cyn gene application makes a break through in hybrid rice technology for commercial utility and this is yet another useful approach to be initiated.
X Public-Private-Partnership for development and promotion of hybrid rice and no discrimination in procurement of hybrid rice grain with minimum support price was suggested for immediate future.
X Hybrids for direct seeding for saving the duration and water, mechanized transplanting and harvesting, monitoring adequate plant population and advising farmers from seed to harvest are the recommended steps for immediate adoption.
X Hybrids need to be developed for wide range of environments and with varied grain quality.