Porth Ymchwil

Professor John Witcombe

Athro Emeritws

Aelodaeth

1 - 50 o blith 74Maint y tudalen: 50
Trefnu yn ôl: Teitl
  1. Cyhoeddwyd

    Variation in RFLP markers associated with root growth in QTLs in Indian upland rice

    Steele, K. A., Moore, B. J., Witcombe, J. R., Virk, D. S. & Price, A. H., 1 Awst 2000, Yn: International Rice Research Notes. 25, 2, t. 16-17

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  2. Cyhoeddwyd

    Trade-offs between on-farm varietal diversity and highly client-oriented breeding - a case study of upland rice in India.

    Virk, D. S. & Witcombe, J., 1 Meh 2007, Yn: Genetic Resources and Crop Evolution. 54, 4, t. 823-835

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  3. Cyhoeddwyd

    The scaling up process and outcomes of participatory crop improvement in Nepal: Adoption and Impact.

    Joshi, K. D., Devkota, K. P., Gyawali, S., Tripathi, M. P., Witcombe, J. R., Pande, S. (gol.), Stevenson, P. C. (gol.), Neupane, R. K. (gol.) & Grzywacz, D. (gol.), 17 Tach 2004.

    Allbwn ymchwil: Cyfraniad at gynhadledd › Papur

  4. Cyhoeddwyd

    The impact of participatory plant breeding (PPB) on landrace diversity: A case study for high-altitude rice in Nepal.

    Joshi, K. D. & Witcombe, J. R., 1 Hyd 2003, Yn: Euphytica. 134, 1, t. 117-125

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  5. Cyhoeddwyd

    Teamwork delivers biotechnology products to Indian small-holder crop-livestock producers: Pearl millet hybrid “HHB 67 Improved” enters seed delivery pipeline

    Hash, C. T., Sharma, A., Kolesnikova-Allen, M. A., Singh, S. D., Thakur, R. P., Bhasker Raj, AG., Ratnaji Rao, M. N. V., Nijhawan, D. C., Beniwal, C. R., Sagar, P., Yadav, H. P., Yadav, Y. P., Srikant, Bhatnagar, S. K., Khairwal, I. S., Howarth, C. J., Cavan, G. P., Gale, M. D., Liu, C., Devos, K. M., Breese, W. & Witcombe, J. R., Awst 2006, Yn: Journal of SAT Agricultural Research. 2, 1, 3 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  6. Cyhoeddwyd

    Selection for salt-tolerance and early heading in bread wheat

    Mahar, A. R., Hollington, P. A., Witcombe, J. R. & Virk, D. S., 1 Ion 2003, Yn: Cereal research Communications. 31, 1-2, t. 81-88

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  7. Cyhoeddwyd

    Rice landrace diversity in Nepal: Variability of agro-morphological traits and SSR markers in landraces from a high-altitude site.

    Bajracharya, J., Steele, K. A., Jarvis, D. I., Sthapit, B. R. & Witcombe, J., 15 Chwef 2006, Yn: Field Crops Research. 95, 2-3, t. 327-335

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  8. Cyhoeddwyd

    Rice landrace diversity in Nepal. Socio-economic and ecological factors determining rice landrace diversity in three agro-ecozones of Nepal based on farm surveys

    Bajracharya, J., Rana, R. B., Gauchan, D., Sthapit, B. R., Jarvis, D. I. & Witcombe, J. R., 1 Hyd 2010, Yn: Genetic Resources and Crop Evolution. 57, 7, t. 1013-1022

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  9. Cyhoeddwyd

    Rice PPB in India and Nepal: Client-oriented plant breeding using few, carefully chosen crosses

    Witcombe, J., Virk, D. & Joshi, K. D., 2019, Farmers and Plant Breeding: Current Approaches and Perspectives. Westengen, O. T. & Winge, T. (gol.). Routledge

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod

  10. Cyhoeddwyd

    Resistance gene deployment strategies in cereal hybrids using marker-assisted selection: gene pyramiding, three-way hybrids, and synthetic parent populations

    Witcombe, J. R. & Hash, C. T., Maw 2000, Yn: Euphytica. 112, t. 175–186

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  11. Cyhoeddwyd

    Regulatory reform of seed systems: Benefits and impacts from a mungbean case study in Nepal

    Joshi, K. D., Khanal, N. P., Harris, D., Khanal, N. N., Sapkota, A., Khadka, K., Dara, R., Neupane, R. K., Joshi, M. & Witcombe, J., 1 Maw 2014, Yn: Field Crops Research. 158, t. 15-23

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  12. Cyhoeddwyd

    REML is an effective analysis for mixed modelling of unbalanced on-farm varietal trials.

    Virk, D. S., Pandit, D. B., Sufian, M. A., Ahmed, F., Siddique, M. A., Samad, M. A., Rahman, M. M., Islam, M. M., Ortiz-Ferrara, G., Joshi, K. D. & Witcombe, J. R., 1 Ion 2009, Yn: Experimental Agriculture. 45, 1, t. 77-91

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  13. Cyhoeddwyd

    QTLs associated with root traits increase yield in upland rice when transferred through marker-assisted selection

    Steele, K. A., Price, A. H., Witcombe, J. R., Shrestha, R., Singh, B. N., Gibbons, J. M. & Virk, D. S., 1 Ion 2013, Yn: Theoretical and Applied Genetics. 126, 1, t. 101-108

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  14. Cyhoeddwyd

    Plant breeding can be made more efficient by having fewer, better crosses

    Witcombe, J. R., Gyawali, S., Subedi, M., Virk, D. S. & Joshi, K. D., 7 Chwef 2013, Yn: BMC Plant Biology. 13, 22

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  15. Cyhoeddwyd

    Partnering with farmers to accelerate adoption of new technologies in South Asia to improve wheat productivity.

    Ortiz-Ferrara, G., Joshi, A. K., Chand, R., Bhatta, M. R., Mudwari, A., Thapa, D. B., Sufian, M. A., Saikia, T. P., Chatrath, R., Witcombe, J. R., Virk, D. S. & Sharma, R. C., 1 Hyd 2007, Yn: Euphytica. 157, 3, t. 399-407

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  16. Cyhoeddwyd

    Participatory varietal selection in rice in Nepal in favourable agricultural environments - A comparison of two methods assessed by varietal adoption

    Joshi, K. D. & Witcombe, J. R., 1 Hyd 2002, Yn: Euphytica. 127, 3, t. 445-458

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  17. Cyhoeddwyd

    Participatory varietal selection (PVS) for post rainy (rabi) season sorghum.

    Rana, B. S., Witcombe, J. R. & Virk, D. S., 1 Ion 2005, 2005 gol. Centre for Arid Zone Studies.

    Allbwn ymchwil: Llyfr/Adroddiad › Adroddiad Comisiwn

  18. Cyhoeddwyd

    Participatory scaling up of participatory varietal selection.

    Joshi, K. D., Gyawali, S. & Witcombe, J. R., 12 Maw 2002, t. 40-43.

    Allbwn ymchwil: Cyfraniad at gynhadledd › Papur

  19. Cyhoeddwyd

    Participatory research approaches rapidly improve household food security in Nepal and identify policy changes required for institutionalisation

    Joshi, K. D., Devkota, K. P., Harris, D., Khanal, N. P., Paudyal, B., Sapkota, A. & Witcombe, J. R., 13 Mai 2012, Yn: Field Crops Research. 131, t. 40-48

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  20. Cyhoeddwyd

    Participatory plant breeding is better described as highly client-oriented plant breeding. II. Optional farmer collaboration in the segregating generations.

    Witcombe, J. R., Gyawali, S., Sunwar, S., Sthapit, B. R. & Joshi, K. D., 1 Ion 2006, Yn: Experimental Agriculture. 42, 1, t. 79-90

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  21. Cyhoeddwyd

    Participatory plant breeding is better described as highly client-oriented plant breeding. I. Four indicators of client-orientation in plant breeding

    Witcombe, J. R., Joshi, K. D., Gyawali, S., Musa, A. M., Johansen, C., Virk, D. S. & Sthapit, B. R., 1 Gorff 2005, Yn: Experimental Agriculture. 41, 3, t. 299-319

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  22. Cyhoeddwyd

    Participatory plant breeding in rice in low-altitude production systems in Nepal

    Gyawali, S., Joshi, K. D. & Witcombe, J. R., 12 Maw 2002, t. 8-10.

    Allbwn ymchwil: Cyfraniad at gynhadledd › Papur

  23. Cyhoeddwyd

    Participatory plant breeding in rice in eastern India-the success of a NGO/GO partnership

    Virk, D. S., Singh, D. N., Kumar, R., Prasad, S. C., Gangwar, J. S. & Witcombe, J. R., 12 Maw 2002, t. 5-7.

    Allbwn ymchwil: Cyfraniad at gynhadledd › Papur

  24. Cyhoeddwyd

    Participatory plant breeding in rice in Nepal.

    Joshi, K. D., Sthapit, B. R., Subedi, M., Witcombe, J. R., Cleveland, D. A. (gol.) & Soleri, D. (gol.), 1 Ion 2002, Farmers: Scientists and Plant Breeding: Integrating Knowledge and Practice. 2002 gol. CABI Publishing, t. 239-267

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod

  25. Cyhoeddwyd

    Participatory plant breeding in maize: a case study from Gujarat, India.

    Witcombe, J. R., Joshi, A. & Goyal, S. N., 1 Ebr 2003, Yn: Euphytica. 130, 3, t. 413-422

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  26. Cyhoeddwyd

    Participatory crop improvement strategies in the DFID Plant Sciences Research Programme

    Witcombe, J. R., 12 Maw 2002, t. 1-4.

    Allbwn ymchwil: Cyfraniad at gynhadledd › Papur

  27. Cyhoeddwyd

    Participatory crop improvement in high potential production systems and salt affected areas of Patiala district of the Punjab State

    Witcombe, J. R., Virk, D. S. & Malhi, S. S., 1 Ion 2002, 2002 gol. Centre for Arid Zone Studies.

    Allbwn ymchwil: Llyfr/Adroddiad › Adroddiad Comisiwn

  28. Cyhoeddwyd

    Participatory crop improvement in high potential production systems - piloting sustainable adoption of new technologies.

    Joshi, K. D., Gyawali, S. & Witcombe, J. R., 1 Ion 2003, 2003 gol. Centre for Arid Zone Studies.

    Allbwn ymchwil: Llyfr/Adroddiad › Adroddiad Comisiwn

  29. Cyhoeddwyd

    Number of crosses and population size for participatory and classical plant breeding

    Witcombe, J. R. & Virk, D. S., 1 Rhag 2001, Yn: Euphytica. 122, 3, t. 451-462

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  30. Cyhoeddwyd

    Mass and line selection can produce equally uniform rice varieties

    Virk, D. S., Steele, K. A. & Witcombe, J. R., 1 Chwef 2007, Yn: Field Crops Research. 100, 2-3, t. 341-347

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  31. Cyhoeddwyd
  32. Cyhoeddwyd

    Marker-evaluated selection in rice: shifts in allele frequency among bulks selected in contrasting agricultural environments identify genomic regions of importance to rice adaptation and breeding.

    Steele, K. A., Edwards, G., Zhu, J. & Witcombe, J. R., 1 Hyd 2004, Yn: Theoretical and Applied Genetics. 109, 6, t. 1247-1260

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  33. Cyhoeddwyd

    Marker-assisted selection to introgress QTLs controlling root traits into an Indian upland rice variety

    Steele, K. A., Price, A. H., Shashidhar, H. E. & Witcombe, J. R., 14 Medi 2006, Yn: Theoretical and Applied Genetics. 112, 2, t. 208-221

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  34. Cyhoeddwyd

    Marker-assisted selection of four root QTL and aroma to improve Kalinga III: Evaluation of pyramid lines and advanced bulks from backcrossing

    Steele, K. A., Singh, D. N., Kumar, R., Prasad, S. C., Billore, M., Virk, D. S., Shashidhar, H. E. & Witcombe, J. R., 1 Ion 2004.

    Allbwn ymchwil: Cyfraniad at gynhadledd › Papur

  35. Cyhoeddwyd

    Marker assisted selection for participatory plant breeding in rice

    Steele, K. A., Virk, D. S. & Witcombe, J. R., 1 Ion 2006, 2006 gol. Centre for Arid Zone Studies.

    Allbwn ymchwil: Llyfr/Adroddiad › Adroddiad Comisiwn

  36. Cyhoeddwyd

    Mapping quantitative trait loci for resistance to downy mildew in pearl millet: Field and glasshouse screens detect the same QTL

    Jones, E. S., Breese, W. A., Liu, C. J., Singh, S. D., Shaw, D. S. & Witcombe, J. R., 1 Gorff 2002, Yn: Crop Science. 42, 4, t. 1316-1323

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  37. Cyhoeddwyd

    Mapping quantitative trait loci for downy mildew resistance in pearl millet

    Jones, E. S., Liu, C. J., Gale, M. D., Hash, C. T. & Witcombe, J. R., Awst 1995, Yn: Theoretical and Applied Genetics. 91, 3, t. 448-456

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  38. Cyhoeddwyd

    Managing an agricultural research programme for poverty alleviation in developing countries: an institute without walls

    Stirling, C. M., Harris, D. & Witcombe, J. R., 1 Ebr 2006, Yn: Experimental Agriculture. 42, 2, t. 127-146

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  39. Cyhoeddwyd

    Linking community-based seed producers to markets for a sustainable seed supply system.

    Witcombe, J. R., Devkotas, K. P. & Joshi, K. D., 10 Medi 2010, Yn: Experimental Agriculture. 46, 4, t. 425-437

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  40. Cyhoeddwyd

    Lessons learned from scaling up participatory variety selection: LI-BIRD experiences.

    Devkota, K. P., Gyawali, S., Tripathi, M. P., Joshi, K. D., Witcombe, J. R., Pande, S. (gol.), Stevenson, P. C. (gol.), Neupane, R. K. (gol.) & Grzywacz, D. (gol.), 17 Tach 2004.

    Allbwn ymchwil: Cyfraniad at gynhadledd › Papur

  41. Cyhoeddwyd

    KASP™ based markers reveal a population sub-structure in temperate rice (Oryza sativa L.) germplasm and local landraces grown in the Kashmir valley, north-western Himalayas

    Shikari, A. B., Najeeb, S., Khan, G., Mohidin, F. A., Shah, A. H., Nehvi, F. A., Wani, S. A., Bhat, N. A., Waza, S. A., Subba Roa, L. V., Steele, K. & Witcombe, J., Maw 2021, Yn: Genetic Resources and Crop Evolution. 68, 3, t. 821–834

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  42. Cyhoeddwyd

    Innovative methods for rice breeding - combining participatory plant breeding (PPB) with molecular marker techniques

    Steele, K. A., Virk, D. S. & Witcombe, J. R., 1 Ion 2002, 2002 gol. Centre for Arid Zone Studies.

    Allbwn ymchwil: Llyfr/Adroddiad › Adroddiad Comisiwn

  43. Cyhoeddwyd

    Increasing the client orientation of maize breeding using farmer participation in eastern India

    Virk, D. S., Chakraborty, M., Ghosh, J., Prasad, S. C. & Witcombe, J. R., 1 Hyd 2005, Yn: Experimental Agriculture. 41, 4, t. 413-426

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  44. Cyhoeddwyd

    Increasing genetic diversity by participatory varietal selection in high potential production systems in Nepal and India

    Witcombe, J. R., Joshi, K. D., Rana, R. B. & Virk, D. S., 1 Rhag 2001, Yn: Euphytica. 122, 3, t. 575-588

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  45. Cyhoeddwyd

    Improving the food security of low-resource farmers: introducing horsegram into maize-based cropping systems.

    Witcombe, J. R., Billore, M., Singhal, H. C., Patel, N. B., Tikka, B. S., Saini, D. P., Sharma, L. K., Sharma, R., Yadav, S. K. & Yadavendra, J. P., 1 Meh 2008, Yn: Experimental Agriculture. 44, 3, t. 339-348

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  46. Cyhoeddwyd

    Impact of introduction of modern varieties on crop diversity

    Witcombe, J. R., Joshi, J. D., Virk, D. S., Sthapit, B. R., Lenne, J. M. (gol.) & Wood, D. (gol.), 1 Ion 2011, Agrobiodiversity Management for Food Security: A Critical Review. 2011 gol. CABI Publishing

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod

  47. Cyhoeddwyd

    Identifying superior wheat cultivars in participatory research on resource poor farms.

    Thapa, D. B., Sharma, R. C., Mudwari, A., Ortiz-Ferrara, G., Sharma, S., Basnet, R. K., Witcombe, J. R., Virk, D. S. & Joshi, K. D., 26 Meh 2009, Yn: Field Crops Research. 112, 2-3, t. 124-130

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  48. Cyhoeddwyd

    Identifying famers' preferences and constraints to Pearl Millet production in the Sahel and North-Sudan zones of Burkina Faso

    Drabo, I., Zangre, R. G., Danquah, E. Y., Ofori, K., Witcombe, J. & Hash, C. T., Hyd 2019, Yn: Experimental Agriculture. 55, 5, t. 765-775

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  49. Cyhoeddwyd

    How narrowly adapted are the products of decentralised breeding? The spread of rice varieties from a participatory plant breeding programme in Nepal.

    Joshi, K. D., Sthapit, B. R. & Witcombe, J. R., 1 Rhag 2001, Yn: Euphytica. 122, 3, t. 589-597

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  50. Cyhoeddwyd

    How much evidence is needed before client-oriented breeding (COB) is institutionalised? Evidence from rice and maize in India

    Witcombe, J. & Yadavendra, J. P., Hyd 2014, Yn: Field Crops Research. 167, t. 143-152

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

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