Heterosis for Seed Yield and Yield Components Over Environments in Castor (Ricinus communis L.) Udasi R. N.*, Sakhare DR. S.B., Dr. Nandanwar R.S. Department of Agricultural Botany, Post Graduate Institute, Dr. PDKV, Akola, 444104, Maharashtra, India *email: ravirajudasi@gmail.com
Online published on 15 December, 2016. Abstract A line x tester analysis using 5 lines and 14 testers was carried out along with three standard checks viz., GCH-4, AKC-1 and 48-1 and it taken up over two environments (two sowing dates) to determine the extent of heterosis for seed yield and seventeen component traits. The average heterosis, heterobeltiosis and standard heterosis over GCH-4, AKC-1 and 48-1 for seed yield/plant across the environments ranged from-20.66% to 116.17%, 25.07% to 90.72%, -18.45% to 67.60%, -7.20% to 90.72% and-25.79% to 52.50% respectively. Out of 70 crosses, the cross combinations AKC-1 X RG 550 (116.17%, 90.72%, 67.60%, 90.72% and 52.50%), AKC-1 X RG 1687 (60.61%, 58.04%, 62.22%, 84.60% and 47.61%), DCS-9 X RG 1410 (84.39%, 81.65%, 59.63%, 81.65% 45.25%), Aruna X RG 1284 (50.48%, 42.53%, 58.27%, 80.11% and 44.02%) and Aruna X RG (60.13%, 40.26%, 55.75%, 77.24% and 41.72%) exhibited significant and high positive heterosis over MP, BP and SH for seedyield per plant over the environments. Across the environments, the cross AKC-1 X RG 550 produced the highest 66.74 g of seed/plant. Magnitudes of heterosis vary from character to character and cross to cross. In general, for seed yield/plant across the environments magnitude of desirable heterosis was high over mid parent and batter parent but low over standard checks. For developing high yielding and earlier maturing genotypes, selection of crosses on the basis of per se performance with considerable per cent average heterosis, heterobeltiosis and standard heterosis would be moredesirable. Top Keywords Castor, Ricinus communis, heterosis, mid parent, better parent, standard heterosis. Top |