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The experiment was carried out under rain fed conditions for three consecutive years (2017–2019) from mid-June to mid-October at Bekoji and Kofele sub sites of Kulumsa Agricultural Research Center, Ethiopia by using improved varieties to identify superior genotypes. The experiment was laid out in a randomized complete block design with three replic...
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The study sought to ascertain spider mite prevalence, infestation, and identification and to assess the response of potato genotypes. In 2022, this pest was only observed on some genotypes in December. In late January, an infestation, incidence, and severity increased from 10 to 13 genotypes on potato tuber stocks stored for irrigation experiments....
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... More than 39 potato varieties have been released for large-scale production, through the contribution of the Ethiopian Institute of Agricultural Research, regional research institutes, higher learning institutions, and private companies (Anonymous, 2022). Breeders select and register these genotypes with a prime focus on yield potential, late blight resistance, earliness, and being stable and broadly adaptable over a range of environments, predominantly during the Meher season (Kolech et al., 2015;Asefa et al., 2016;Kolech et al., 2017;Tsagaye et al., 2023). Even though the improved varieties have been reported to be high-yielders and resistant to late blight, their adoption by farmers has been low in most areas, as reasoned by Abebe et al. (2013) as lacking the attributes desired by farmers. ...
... In line with the present finding (Amenu et al., 2022;Tessema et al., 2020;Tessema et al., 2022;Abdena and Bedassa, 2023;Tsagaye et al., 2023;Daemo and Ashango, 2024), they reported the wide variation in mean values of the number of stems per hill in different potato varieties in different study sites of Ethiopia. ...
... Numerous other scholars also reported the presence of significant differences among potato cultivars for those tuber quality traits (Abebe et al., 2013;Mohammed, 2016). Tsagaye et al. (2023) also reported comparable results for experiments conducted at Bekoji and Kofele among potato clones for specific gravity. The AMMI-2 bi-plot analyses of MTY (t ha -1 ) of twelve potato varieties evaluated in ten environments are shown in Figure 2a. ...
The goal of potato breeding is to develop widely adaptable, highly productive cultivars that farmers would prefer. The objective of this study was to evaluate the performance and stability of potato varieties linking the preferences of smallholder farmers in rain-fed and irrigated environments. Using a randomized complete block design in three replicates, twelve potato cultivars were assessed in 10 settings in Southeast Ethiopia during the Meher and Belg seasons in 2019 and 2020. The environments, genotypes, and GEI all revealed significant differences (p<0.001) in the pooled analysis of the variance of tuber yield. The tuber yield variances for GEI, environment, and genotypic impacts were 15.48%, 7.61%, and 59.49% explained by the AMMI analysis, respectively. The environments were grouped into three distinct categories. A total of 99.6% of the variance was the cumulative contribution of PC1, PC2, PC3, PC4, and PC5 sharing 80.8%, 11.3%, 4.3%, 2.2%, and 1.0%, respectively High-yielding and widely adapted were Gera, Gudanie, Bubu, Belete, Shenkolla, Guassa, and Maracharre varieties, according to the AMMI, BLUP, GGE biplot, and WAAS. However, dynamic types that were particularly affected by environmental variations include Jalenie, Dagim, Gorebella, Awash, and Zemen. A stability measure of metric and preference based on various traits identified Gudanie and Guassa varieties. The scores of the small holder farmers were consistent throughout the test environments. The canonical correlation analysis indicated the significant association between the metric traits collected by the breeder and the small- holder farmer preferences. The study provides baseline data for potato breeding, and the varieties must be evaluated in the nation's mega-environments for additional recommendations. Int. J. Agril. Res. Innov. Tech. 14(2): 85-98, December 2024
In a breeding program, knowledge regarding the direct and indirect effects of traits and understanding the traits' relationships in potato genotypes are vital prerequisites for crop improvement. The main focus of the research was to assess the correlation and path analysis in 32 CPRI advanced potato breeding lines using a randomized block design with three replications to direct proper selection criteria for tuber yield in the Terai region of Uttarakhand. Each genotype was assessed for twelve yield-related traits, and the mean data was used for further analysis. Correlation coefficient analysis showed that the average weight of tubers per plant, number of tubers per plant, tuber length, tuber girth, number of branches per plant, and plant height contributed to the highest positive correlation with tuber yield. The path coefficient result revealed that the average weight of tubers per plant, number of tubers per plant, and number of branches per plant had the highest positive direct effect on yield, whereas the effects of other traits were low. Therefore, these specific characters could be used as selection criteria to improve the yield performance of potatoes.
