Green Global
Foundation   Journal
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GENETIC STUDY OF SOME AGRONOMICAL TRAITS THROUGH SINGLE CROSS ANALYSIS IN BLACKGRAM [Vigna mungo (L.) Hepper] (Pages : 22 - 28)

The present investigation deals with the genetic study of six agronomic characters namely shoot weight (SHW), root weight (RW), number of pods per plant (NPdPP), pod weight per plant (PdWPP), number of seeds per plant (NSPP) and seed weight per plant (SWPP) in two crosses viz. cross I (line-21×line-17) and cross II (line-21×line-20) between three lines of blackgram. In Mather’s scaling test, A, B and C were non-significant in most of the cases. The potence values were observed non-significant for all the characters, except for NPdPP in cross II where it was significant. In the Joint scaling test, the non-significant ?2 values was found in cross I for SHW, PdWPP and SWPP. In RW non-significant ?2 was found in both of the crosses. Non-significant ?2 values indicated that the presence of only additive-dominance relationship in these characters. For estimates of the components of variation, D and H for all the characters in both of the crosses expressed negative values, except for NPdPP and NSPP where D were positive. In almost all the cases over dominance was found in negative direction. In these materials due to the low and negative genetic components of variation, heritability and genetic advance were found to be low and negative. However, high and moderate heritability with 77% and 35% for NPdPP and NSPP, respectively were found in cross II. Selection practices may be fruitful with these characters and crosses as they also showed positive and moderate genetic advance. Download