INHERITANCE STUDY OF SEVEN QUANTITATIVE CHARACTERS USING NORTH CAROLINA DESIGN IN SUGARCANE

Abstract

Seven quantitative characters viz. germination percentage (Germi. %), number of tiller/clump (NT/C), number of millable cane/clump (NMC/C), cane stalk height (CSH), cane stalk girth (CSG), field brix (FB) and cane yield/clump (CY/C) were considered for inheritance study using North Carolina Design I (NCD I). In this study, ten crosses were carried out. Among the ten crosses highest 7.2 gm and the lowest 2.5 gm fuzz were produced by the cross I 34-95 x Co 642 and cross Isd 25 x I 101-66, respectively. Seedling production and its survivability was higher from the fuzz developed by the cross I 157-94 x I 101-66. From this cross, 4.4 gm fuzz produced the highest 65 number of seedlings and among these finally 49 were survived. The mean value was highly significant for all the characters indicated that the varieties were different regarding these characters. The maximum range of variation was observed for Germi. % followed by FB, NT/C and NMC/C. The magnitude of dominance component (H) was higher than that of additive component (D) in maximum cases. In the present material, both broad and narrow sense habitability were found to be low. Comparatively high genetic advance (GA) in narrow and broad senses were shown by NT/C and Germi. %, respectively. The highest genetic advance expressed as percentage of mean (GA%) was recorded for NT/C in case of narrow sense heritability and for CSH in case of broad sense heritability.