Stability analysis of tuber yield using unbalanced data from potato variety trials

Mijic, Zlatko; Kozumplik, Vinko; Šarčević, Hrvoje; Meglič, Vladimir; Varnica, Ivan; Čupić, Tihomir

doi:10.2298/gensr1903151m

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…The results are in accordance with Mijic et al (2019) and Flis et al (2014), who also observed higher influence of environment during the evaluation of potato varieties across the locations. Relatively low contribution of genetic variance to the total variance was also reported earlier (Mijic et al, 2019).…”

Section: Resultssupporting

confidence: 91%

BLUP and stability analysis of multi-environment trials of potato varieties in sub-tropical Indian conditions

Sood

Bhardwaj

Kumar

et al. 2020

Heliyon

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Potato is an important crop in India with area spread across Himalayan hills in the North to hot tropical conditions in South, albeit major area in subtropical Indo-Gangetic plains. The first common requirement in all regions is that the variety should have high performance for tuber yield along with essential agronomic traits. The present study was carried out to identify an ideal variety with wide adaptability for tuber yield and dry matter. Six varieties were evaluated in 9, 11 and 10 locations in the years 2014-15, 2015-16 and 2016-17, respectively for TY, MY and DM. The data were analysed with ANOVA, mixed models, BLUPs and GGE biplot as well as univariate stability statistics. Combined analysis of variance showed significant genotype, environment and genotype Â environment interactions. The relative magnitudes of G, E and GÂE variances accounted for 6.76-8.91, 51.85-76.65 and 12.41-23.19 per cent for TY and 2.86-4.66, 65.87-72.85 and 13.74-20.04 per cent for DM. Although the genotypes contributed significantly, major part of the variation was explained by environments for all the three traits. Mean across locations and years, and BLUP values of varieties for all the three traits showed similar results with Kufri Khyati as the best variety for TY and MY, whereas Kufri Jyoti and Kufri Garima were best for DM. Based on GGE biplot and univariate stability statistics, Kufri Khyati was the ideal high yielding wide adaptable variety in all the three years and Kufri Jyoti was the ideal variety based on mean dry matter and stability. The environments were very diverse and their clustering suggested three groups, which can be used as three separate zones for varietal evaluation and regional deployment of varieties.

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Section: Resultssupporting

confidence: 91%

BLUP and stability analysis of multi-environment trials of potato varieties in sub-tropical Indian conditions

Sood

Bhardwaj

Kumar

et al. 2020

Heliyon

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“…Furthermore, in recent years, the best linear unbiased predictors (BLUPs) derived from mixed linear models are increasingly being used for the genetic assessment of segregating breeding populations [5][6][7]. The BLUPs facilitate the comparison of breeding clones from different populations evaluated in distinct environments, as well as analyzing unbalanced datasets resulting from testing trials [8]. The BLUPs predict random effects that show a covariance structure.…”

Section: Introductionmentioning

confidence: 99%

Heritable Variation, Genetic and Phenotypic Correlations for Tuber Traits and Host Plant Resistance to Late Blight for Potato Breeding in Scandinavian Testing Sites

et al. 2021

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Potato breeding aims to improve crop productivity, quality and resilience based on heritable characteristics. Estimating the trait heritability and correlations—both genetic and phenotypic—among characteristics in a target population of environments allows us to define the best breeding method that leads to selection gains. Breeding clones (47) and released cultivars (209) were grown using simple lattice designs at three testing sites in northern and southern Sweden to estimate the best linear unbiased predictors (BLUPs) derived from mixed linear models for characteristics such as tuber weight (total and according to sizes), host plant resistance to late blight (caused by the oomycete Phytophthora infestans) and tuber quality (starch percentage based on specific gravity measurements and reducing sugars). There was significant heritable variation for all the characteristics investigated. Tuber starch percentage and total tuber weight were the traits with the highest broad-sense heritability (H2), while the weight for the smallest size (<40 mm) had the highest H2 among the different tuber categories. These results show the potential for further improving these traits for Scandinavia through recombination and selection in segregating offspring. The genetic and phenotypic correlations among the tuber weight characteristics were significant (p ≤ 0.05) irrespective of their sizes, but none were significant (p > 0.05) with tuber starch percentage. Host plant resistance to late blight was negatively and significantly associated with tuber weight and starch percentage, thereby showing the strong effects of this disease on the productivity and quality of the potatoes.

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Adaptability, stability, and productivity of potato breeding clones and cultivars at high latitudes in Europe

Ortiz,

Reslow,

Huicho

et al. 2024

Discov Life

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The aim of potato breeding is to release cultivars that exhibit high and stable performance across the target population of environments. The objective of this research was therefore to investigate the use of various methods (site regression [SREG], coefficient of variation and regression deviation [σ2δ]) for determining the adaptability and stability of productive and quality traits in the Nordic region of Europe. The multi-environment trials included 256 breeding clones and released cultivars grown by EU farmers at three distinct testing sites over two years in Sweden. There was significant (P < 0.001) variation in tuber yield, starch percentage and reducing sugars in the tuber flesh among the breeding clones and cultivars, testing environments and the genotype by environment interaction (GEI). The environments were very diverse, as revealed by the SREG biplots and particularly for the GEI patterns noted in terms of their productive and quality characteristics. The percentage of stable high-tuber yielding germplasm was greater for breeding clones (23%) than for released European cultivars (2%), thus revealing the advantage of potato breeding in the target population of environments. SLU 1415001 and SLU 1314015 were the most promising breeding clones due to their stable high tuber yield. This characteristic was best for the starch potato cultivars, although none of them exhibited a significant different σ2δ. ‘Talent’ shows an almost stable good performance among low reducing sugar cultivars and breeding clones, which are often unstable in terms of their scoring across environments. Neither a breeding clone nor a cultivar was at the top for stable tuber yield, tuber flesh starch or reducing sugars in the tuber flesh, which shows the challenge faced by potato breeding while addressing the needs of different markets.

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Stability analysis of tuber yield using unbalanced data from potato variety trials

Cited by 6 publications

References 33 publications

BLUP and stability analysis of multi-environment trials of potato varieties in sub-tropical Indian conditions

BLUP and stability analysis of multi-environment trials of potato varieties in sub-tropical Indian conditions

Heritable Variation, Genetic and Phenotypic Correlations for Tuber Traits and Host Plant Resistance to Late Blight for Potato Breeding in Scandinavian Testing Sites

Adaptability, stability, and productivity of potato breeding clones and cultivars at high latitudes in Europe

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