Download Crop variety improvement and its effect on productivity: the by Robert E Evenson, Douglas Gollin PDF

By Robert E Evenson, Douglas Gollin

This ebook studies at the productiveness affects of varietal development examine carried out at a few foreign centres affiliated with the Consultative staff on foreign Agricultural examine. Such centres were on the vanguard of a 40-year attempt to reproduce new different types of the world's staple nutrition plants. The contributed chapters are the most manufactured from a examine initiated and supported by means of the effect review and overview team (now the status Panel on influence overview) of the CGIAR. Descriptive info and econometric types were used to guage the influence of study on eleven plants and state case experiences in Brazil, China and India. The contents comprise an creation and technique part (3 chapters); crop reviews on rice, wheat, maize, sorghum, pearl millet, barley, lentils, potato, cassava, groundnut and customary bean (Phaseolus vulgaris); case stories in Brazil, China and India; and a suite of three synthesis papers reporting worldwide and local affects on creation and human welfare. The booklet should still turn out of important curiosity to these operating inside plant breeding, crop technology and agricultural economics. on hand In Print

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Few, if any, of these varieties are suited to deepwater production environments. Varieties suited to upland production are also few in number, with a small concentration released in Brazil. Three different IARCs have been involved in rice crop genetic improvement. For Asia, IRRI has played a major role in producing important rice varieties. The relationship between IRRI and Asian NARS is in some sense the most ‘mature’ of such relationships. After the 1970s, IRRI’s role was increasingly that of a germplasm supplier, Fig.

Simply put, countries that perceived they could draw on useful flows of material from the international research system were likely to invest more in national research programmes than countries that did not have access to much useful material. The second of the synthesis chapters, Chapter 22 reports an evaluation of the production gains associated with crop genetic improvement. These production gains are estimated utilizing data on farmer adoption of modern crop varieties from the crop studies (Chapters 4–16) and the country studies (Chapters 18–20).

This has not occurred in the other studied crops to any significant extent. It is also clear from data on genetic resource content of varieties that CIMMYT and NARS breeding materials (germplasm) have been widely used by the private sector. The public sector thus created the ‘platforms’ on which the private sector was built. A similar phenomenon occurred in temperate zone maize breeding many years earlier. In many respects, maize has been a Green Revolution crop in the same sense as rice and wheat.

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