Vol. 12, Issue 12 (2023)

Author(s):
NM Bhut, BA Monpara, PA Vavdiya, BR Parmar, GK Sapara and CJ Rajani

Abstract:
In the present investigation, five pigeonpea crosses namely GJP 1 × BRG 14-1, GJP 1 × BDN 2010-1, NTL 740 × BRG 14-1, TDRG 107 × BDN 2010-1 and GJP 1310 × BSMR 853 were studied to understand the extent of heterosis over better-parent (BP) and standard variety (SV) for seed yield and its attributing characters. The cross GJP 1 × BDN 2010-1 exhibited the highest standard heterosis followed by GJP 1 × BRG 14-1 for seed yield per plant. It was observed that crosses GJP 1 × BDN 2010-1 and GJP 1 × BRG 14-1 were heterotic for seed yield per plant and majority of trait in desirable direction. The highest significant and negative inbreeding depression for seed yield per plant was observed in GJP 1 × BDN 2010-1 and followed by GJP 1 × BRG 14-1. High heterosis exhibited by seed yield per plant was due to heterosis for number of primary branches per plant, number of secondary branches per plant, number of pods per plant and number of seeds per pod. Positive and significant heterosis over better parent along with positive inbreeding depression recorded in above traits may be attributed to major contribution from dominance (h) and additive × additive (i) gene effects and selection will be effective only in later generations. Seed yield is controlled by polygenes and is influenced by other component characters.