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Chủ Nhật, ngày 18 tháng 4 năm 2010

Current situation of cassava in Vietnam and the breeding of improved cultivars


Hoang Kim1, Nguyen Van Bo2, Nguyen Phuong1, Hoang Long 3,
Tran Cong Khanh 3, Nguyen Trong Hien 2, Hernan Ceballos4,
Rod Lefroy 4, Keith Fahrney 4, Reinhardt Howeler4 and Tin Maung Aye4

ABSTRACT
In 2008 cassava production in Vietnam was about 9.40 million tonnes, up from only 1.99 million tonnes in 2000. This was the result of both area expansion, from 237.600 ha to 557.700 ha, and marked increases in yield, from 8.36 t/ha in 2000 to 16.91 t/ha in 2008. Vietnam has made the fastest progress in application of new technologies in breeding and new varieties propagation in Asia. Such progress has been considered as a result of many factors, of which the success in breeding and application of new technologies were the main contributing factors. Cassava yields and production in several provinces have more than doubled due to the planting of new high-yielding cassava varieties in about 500.000 ha, mainly KM94, KM140, KM98-5, KM98-1, SM937-26. KM98-7 varieties. and the adoption of more sustainable production practices. Cassava chips and starch is now being produced competitively, and cassava markets are promising. The combination of wide spread production of fresh cassava roots and the processing of cassava into chips starch and ethanol has created many jobs, has increased exports, attracted foreign investment, and contributed to industrialization and modernization of several rural areas. The largest array of field trials to evaluate cassava varieties for improved ethanol production from the CIAT core collection that is held in Vietnam and from the breeding programmes of VNCP research partners. A total of 24.073 cassava sexual seeds from CIAT and 37,210 seeds from 9- 15 cross combinations made in Vietnam 38 breeding lines (mainly from Thailand), and 31 local farmer's varieties. have been planted. Of these, 98 of the best lines are now in the final stages of the selection process. and three of the most promising, KM140, KM98-5 and KM98-7 has recently been released in the period 2007 - 2009. The new advanced cassava varieties KM297, KM228, KM318, KM325, KM397, KM414, KM419, KM21-12, SC5, HB60 are being undertaken in the Regional Yield Trials (RYT) of Dong Nai, Tay Ninh, Ninh Thuan. and Yen Bai provinces.

Key words: Cassava, breeding, Vietnam
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1 Nong Lam University (NLU). Linh Trung. Thu Duc. Ho Chi Minh City. Viet Nam. hoangkim_vietnam@yahoo.com; phuongdtg@yahoo.com ; http://cropsforbiofuel.blogspot.com
2 Vietnam Academy of Agricultural Sciences (VAAS). Van Dien. Thanh Tri. Ha Noi nvbo@hn.vnn.vnn; trong_hienccc@yahoo.com
3 Institute of Agriculture Science for Southern Vietnam (IAS); 121 Nguyen Binh Khiem dist. 1. Ho Chi Minh city. trancongkhanh_vietnam@yahoo.com.vn ; luckydragon1985@yahoo.com
4 International Center for Tropical Agriculture (CIAT). Cali. Colombia; h.ceballos@cgiar.org ; r.lefroy@CGIAR.ORG; k.fahrney@cgiar.org ; r.howeler@cgiar.org; t.aye@cgiar.org
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http://www2.hcmuaf.edu.vn/contents.php?ids=5380&ur=hoangkim http://biofuelexperts.ning.com/profile/HoangKimVietnam%22 ,

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