Yield stability and test location representativeness in foxtail millet [Setaria italica (L.) Beauv.] genotypes

Abstract

Development of a crop variety with high grain yield and stability in test locations is an important part of crop breeding program. Thirteen foxtail millet genotypes were evaluated in randomized complete block design with three replications in Jumla and Dolakha, Nepal from April to August in three consecutive years 2017, 2018, and 2019. The objective of this study was to analyze grain yield stability and adaptability of foxtail millet genotypes applying genotype main effect plus genotype by environment interaction (GGE) biplot analysis. The results showed that grain yields were significantly (P<0.05) affected by the environment (E), genotype (G), and their interaction (G×E). The genotype HUMLA-163 had regression coefficient equal to unity (b=1.01), thus this genotype had average adaptation to all environments whereas HUMLA-213 (b=1.18) and HUMLA-252 (b=1.19) had regression coefficients greater than unity, thus these genotypes were more adapted to favorable environments. GGE biplot showed that HUMLA-163 was more stable and adaptive genotype. Thus, genotype HUMLA-163 is recommended for release as a variety to improve foxtail millet production in hilly region of Nepal.

Genotype×Environment Interaction and Stability Analysis for Quality Parameters in Little Millet (Panicum sumatrense L.)

“…The variance due to pooled deviation was found significant for hulling (%), chlorophyll content (mg 100 g -1 fresh weight), leaf area (cm 2 ), protein content (%), crude fiber (%), mineral matter (mg 100 g -1 ), iron content (mg 100 g -1 ), calcium content (mg 100 g -1 ) and ash content (mg 100 g -1 ). Highly significant differences among genotypes, environments and G×E interaction were reported by Fentie et al (2013), Soodet al (2018 and Kandel et al (2020). The environmental indices computed for the quality characters studied were presented in Table 2 indicating both the favourable and unfavourable environments for all the component characters.…”

“…Patil (2007) reported the genotypes viz., RPSP 742, EC 138375 and RPSP 732 were high yielder with average stability of genotypes. Kandel et al (2020) reported significant genotypes and genotypes and their interaction for plant height along with genotype CO-4656 which had mean yield that was higher than the overall mean (0.429 t ha -1 ) with parameter of response (b i )=1.16 and parameter of stability (S 2 di)=0.05.…”

Genotype × Environment Interaction and Stability Analysis for Grain Yield and Yield Related Traits in Little Millet (Panicum sumatrense L.)

“…The variance due to pooled deviation was found significant for days to 50% flowering, productive tillers per plant, spikes per panicle, hulling (%). Highly significant differences among genotypes, environments and G x E interaction were reported by Fentie et al [10], Sood et al [11], Ataei and Reza [12] and Kandel et al [13].…”

“…* and ** significant at 5 and 1 per cent levels, respectively when Ho: bi = 0 + and ++ significant at 5 and 1 per cent levels, respectively when Ho: bi = 1 Where, bi and S 2 di were regression coefficient and deviation from regression, respectively * and ** significant at 5 and 1 per cent levels, respectively when Ho: bi = 0 + and ++ significant at 5 and 1 per cent levels, respectively when Ho: bi = 1 Patel et al [15] found out significant G × E interaction for grain yield per plant. Kandel et al [13] reported that the genotype CO-4656 had mean yield which was higher than the overall mean (0.429 t/ha), parameter of response (b)=1.16 and parameter of stability (S2di)=0.05. Madhavilatha et al [18] reported average stability for grain yield was found in VR 990 which revealed the wide adaptability of the genotype across different locations.…”

“…Madhavilatha et al [18] reported average stability for grain yield was found in VR 990 which revealed the wide adaptability of the genotype across different locations. Kandel et al [13] studied genotypes viz., GE-0382, KLE-216, NE-94 and KLE-559 that were found environmentally sensitive producing higher grain yield throughout the environments. Shanthakumar and Lohithaswa [21] reported that the genotype PPR-2614 was also found stable for fodder yield per plant with higher mean value.…”