Participatory Varietal Selection for Promising Rice Lines

Abstract

The purpose of rice breeding is to create varieties that are well adapted, highly productive, and acceptable to farmers. However, rice productivity is limited as a result of combined biotic stresses (pests/diseases). This study combines assessment by farmers with the evaluation by breeders with respect to promising rice lines within a range of environments. The aim is to investigate farmers’ preferences and to characterize the yield of promising rice lines, as well as their resistance to pests/diseases by consulting 120 farmers and breeders. This study used an oversite design replicated three times with thirteen promising lines and two varieties, which were all evaluated at farmers’ fields between December 2019 and May 2020. The Importance Performance Analysis was used to compare line performance and farmers’ expectations. Lines Gamapadi-2 and Gamapadi-4 had the highest acceptability scores based on the farmers’ preferences. The yield performances were evaluated using the Finlay–Wilkinson test and the genotypes were evaluated using environmental models (GGE biplot) to determine the most stable lines to be recommended for large-scale planting. The Finlay–Wilkinson and GGE biplot conclusion analyses also showed that the Gamapadi-2 and Gamapadi-4 lines exhibited high potential yield and stability, as well as indications of specific advantages. The results for both lines in all locations indicated no symptoms of damage caused by brown planthoppers or bacterial leaf blight. These lines in all age ranges at two sites showed no symptoms of leaf blast.

Correlation coefficient and path analysis of yield and yield attributing characters of rice (Oryza sativa L.) genotypes under reproductive drought stress in the Terai region of Nepal

“…Participatory Varietal Selection (PVS), that was launched at the Lumle Agriculture Center in 1989-1990, seems to be an effective strategy because it evaluates, confirms, and promotes new rice cultivars while taking into account the socio-technological context of the end-users and highlights their preferences (Kosanke, 2019). The PVS technique has been using indigenous knowledge to accelerate the adoption of emerging types of rice genotypes (Aristya et al, 2021). Drought stress is significant due to main five factors: its unpredictable nature, manner of occurrence, severity, length, and timing (Abarshahr et al, 2011).…”

Technological performances and economic feasibility in rice irrigated farming

“…If varieties are sufficient according to farmers' preferences, the availability of seeds was limited when farmers needed them. Each rice variety will provide optimal results if planted in the appropriate field [25].…”

Rice cultivar selection in an agroforestry system through GGE-biplot and EBLUP

“…Therefore, location-specific rice cultivars should be selected to obtain high yields. Aristya et al (2021) reported that GM 28 has the highest mean yield per hectare (6.980 tons ha −1 ) in an irrigated paddy field in three districts in Central Java Province, Indonesia.…”