Cassava varietal improvement in India

By:

NAYAR, G.G

Contributor(s):

Material type: Article

ArticleLanguage: English Description: p. 35-42Subject(s): LOC classification:

34205

In: In: Howeler, R.H.; Kawano, K. (eds.). Regional Workshop on Cassava Breeding and Agronomy Research in Asia (1987, Rayong, Thailand). Cassava Breeding and Agronomy Research in Asia: Proceedings of a regional workshopSummary: Se revisa el mejoramiento var. de la yuca en India que se realiza principalmente a traves de seleccion de clones promisorios de germoplasma autoctono y exotico, hibridacion intervarietal e interespecifica, produccion artificial de razas cromosomicas, induccion de mutacion y tecnicas de cultivo de tejidos. M-4, uno de los cv. populares introducido de Malaya, se cultiva actualmente en zonas donde la yuca se utiliza principalmente para consumo fresco por humanos. En forma similar, Sree Prakash, una seleccion de la coleccion autoctona, se identifico como un cv. de maduracion temprana y registro un rendimiento de 35-40 t/ha en 7 meses. Se han desarrollado 5 clones hibridos de alto rendimiento despues de hibridacion simple o multiple que involucra germoplasma autoctono y exotico. Estos hibridos han registrado rendimientos de 33-40 t/ha en comparacion con 23-28 t/ha del cv. local. La produccion de tetraploides y triploides, con un mayor contenido proteinico y de MS, resp., es otro de los logros del programa de mejoramiento de yuca. Tambien estan en curso investigaciones para desarrollar clones con tolerancia al sombrio y a la sequia, un mejor tipo de planta para el espaciamiento cercano, cosecha temprana, menor requerimiento de fertilizante, alto rendimiento con buena calidad culinaria y alto contenido de almidon. (RA- CIAT)Summary: Cassava var. improvement in India is reviewed; it is mainly carried out through selection of promising clones from both indigenous and exotic germplasm, intervarietal and interspecific hybridization, artificial production of chromosomal races, induction of mutation, and tissue culture techniques. M-4, one of the popular cv. introduced from Malaya, is presently grown in areas where cassava is mainly used for fresh human consumption. Similarly, Sree Prakash, a selection from the indigenous collection, was identified as an early maturing cv. and recorded a yield of 35-40 t/ha in 7 mo. Five high yielding hybrid clones have been developed following single or multiple hybridization involving both indigenous and exotic germplasm. These hybrids have recorded yields of 33-40 t/ha as compared with 23-28 t/ha of the local cv. The production of tetraploids and triploids, with higher protein and DM content, resp., are the other achievements by the cassava breeding program. Research to develop clones with shade and drought tolerance, better plant type for close spacing, early harvestability, lower fertilizer requirement, high yield with good culinary quality, and high starch content is also in progress. (AS)

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Holdings
Item type	Current library	Collection	Call number	Copy number	Status	Date due	Barcode	Item holds
Book Chapters	CIAT Library Document collection CINFOS	Document Collection CINFOS	34205 (Browse shelf(Opens below))	c.1	Short Loan

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Se revisa el mejoramiento var. de la yuca en India que se realiza principalmente a traves de seleccion de clones promisorios de germoplasma autoctono y exotico, hibridacion intervarietal e interespecifica, produccion artificial de razas cromosomicas, induccion de mutacion y tecnicas de cultivo de tejidos. M-4, uno de los cv. populares introducido de Malaya, se cultiva actualmente en zonas donde la yuca se utiliza principalmente para consumo fresco por humanos. En forma similar, Sree Prakash, una seleccion de la coleccion autoctona, se identifico como un cv. de maduracion temprana y registro un rendimiento de 35-40 t/ha en 7 meses. Se han desarrollado 5 clones hibridos de alto rendimiento despues de hibridacion simple o multiple que involucra germoplasma autoctono y exotico. Estos hibridos han registrado rendimientos de 33-40 t/ha en comparacion con 23-28 t/ha del cv. local. La produccion de tetraploides y triploides, con un mayor contenido proteinico y de MS, resp., es otro de los logros del programa de mejoramiento de yuca. Tambien estan en curso investigaciones para desarrollar clones con tolerancia al sombrio y a la sequia, un mejor tipo de planta para el espaciamiento cercano, cosecha temprana, menor requerimiento de fertilizante, alto rendimiento con buena calidad culinaria y alto contenido de almidon. (RA- CIAT) spa

Cassava var. improvement in India is reviewed; it is mainly carried out through selection of promising clones from both indigenous and exotic germplasm, intervarietal and interspecific hybridization, artificial production of chromosomal races, induction of mutation, and tissue culture techniques. M-4, one of the popular cv. introduced from Malaya, is presently grown in areas where cassava is mainly used for fresh human consumption. Similarly, Sree Prakash, a selection from the indigenous collection, was identified as an early maturing cv. and recorded a yield of 35-40 t/ha in 7 mo. Five high yielding hybrid clones have been developed following single or multiple hybridization involving both indigenous and exotic germplasm. These hybrids have recorded yields of 33-40 t/ha as compared with 23-28 t/ha of the local cv. The production of tetraploids and triploids, with higher protein and DM content, resp., are the other achievements by the cassava breeding program. Research to develop clones with shade and drought tolerance, better plant type for close spacing, early harvestability, lower fertilizer requirement, high yield with good culinary quality, and high starch content is also in progress. (AS) eng