This research work was conducted for development of autumn specific stable bivoltine breeds and hybrids by utilizing eighteen silkworm autumn specific lines (ASLs) and six autumn specific hybrids (ASH). These line/hybrids were developed, incubated and evaluated during autumn season as per the standard rearing procedure to identify stable breeds and hybrids suitable for temperate climatic conditions of Jammu and Kashmir (UT). The results obtained through EI at F9, F10 and F11 generations clearly showed that eight out of eighteen breeding lines (BLs) viz., Line-3, Line-5, Line-6, Line-7, Line-9, Line-16, Line-17 & Line-18 and four out of six ASHs viz., ASH-1, ASH-1R, ASH-3 and ASH-3R have exhibited higher index values (>50) and influenced significantly on the expression of traits with stable and have economically importance. Hence, the lines identified from the study can conveniently be utilized for developing stable and productive hybrids and also the hybrids developed i.e. ASH-1 & ASH-3 can be used for commercial exploitation at farmers level during the autumn season in temperate climatic condition of Jammu and Kashmir.