Stability of yield and its components in vegetable amaranth

An experiment was conducted during summer season (February-April) of 2008, 2010 and 2011 at ICAR Research Complex for Eastern Region Research Centre, Ranchi (Jharkhand, India) to study the stability parameters viz., regression coefficient (bi) and mean square deviations (s²di) from linear regression, along with per-se performance of 14 lines/varieties of vegetable amaranth (Amaranthus tricolor L.) for nine yield related characters. The line HAMTH-15 (19.79 t/ha) was the top yielder of greens/ha, stable and suitable for favourable environment. The line was also better performing, stable and suitable for favourable environment for length of internode (6.16 cm), length of lamina (9.23 cm) and width of lamina (6.34 cm) and for unfavourable environment for girth of stem (0.64 cm) and leaf-stem ratio (1.05). The line HAMTH-13 was also very promising, stable and suitable for unfavourable environment for yield of greens (17.43 t/ha).