Grain yield stability of promising proso millet (Panicum miliaceum L.) genotypes for hilly region of Nepal

Authors : Manoj KANDEL, Narayan Bahadur DHAMI, Tirtha Raj RIJAL, Jiban SHRESTHA

Pages : 5-11

View : 37 | Download : 9

Publication Date : 2020-06-30

Article Type : Research Paper

Abstract :Identification of genotypes with a high potential for yield and stability across environments is an essential task in plant breeding. The experiments were conducted in three consecutive years viz 2017, 2018 and 2019 during spring seasons across two locations viz Dolakha; and Jumla using 13 proso millet genotypes in Nepal. Proso millet genotypes were evaluated in randomized complete block design with three replications. The objectives of this study were to analyze yield stability and adaptability of proso millets genotypes and to evaluate the discrimination and representativeness of locations by genotype and genotype by environment interaction insert ignore into journalissuearticles values(GGE); biplot methods. The significant genotypes and genotypes and their interaction insert ignore into journalissuearticles values(P<0.05); were observed for day to maturity, plant height and grain yield which indicated the presence of difference among the genotypes. The combined analysis over environments showed that the average values of days to maturity was 118 days, plant height of 112 cm and grain yield of 0.429 t/ha. The genotypes CO4656 had mean yield 0.495 t/ha which was higher than the overall mean insert ignore into journalissuearticles values(0.429 t/ha);, parameter of response insert ignore into journalissuearticles values(b);=1.16 and parameter of stability insert ignore into journalissuearticles values(S2di);=0.05. This genotypes could be represented as stable and widely adapted across tested environments. The genotype CO3149 was specifically adapted to favourable environment of Jumla because its regression coefficient was significantly more than unity insert ignore into journalissuearticles values(b=1.25); mean yield is higher insert ignore into journalissuearticles values(0.478 t/ha); than the average insert ignore into journalissuearticles values(0.429 t/ha); and S2di was nearly zero insert ignore into journalissuearticles values(0.101);. Similarly genotype HUMLA-312 was specifically adapted to Dolakha environment because its regression coefficient was significantly more than unity insert ignore into journalissuearticles values(b=1.14);, mean yield was higher insert ignore into journalissuearticles values(0.451 t/ha); than the average insert ignore into journalissuearticles values(0.429 t/ha); and S2d was nearly zero insert ignore into journalissuearticles values(0.140);. GGE biplot showed genotype CO4656 was stable genotype under tested environments.
Keywords : Prosomillet Panicum miliaacum L,

ORIGINAL ARTICLE URL