HETEROSIS AND INBREEDING DEPRESSION IN INDIAN MUSTARD [BRASSICA JUNCEA (L.) CZERN & COSS

Abstract

The present investigation was undertaken with a view to generate information on heterosis and inbreeding depression for seed yield and its component traits in six hybrids of Indian mustard (Brassica juncea (L) Czern & Coss).Out of the six hybrids,hybrid GM-3 × EC766495 showed maximum relative heterosis while the cross GM-2 × EC766434 exhibited the highest heterobeltiosis It also showed significant and positive estimates for both RH and HB for siliqua length,number of siliqua per plant, yield per plant and oil content.Yield attributing characters like seeds per siliqua, siliqua length and number of siliqua are positive and significant for the crosses GM-1 × EC766043, GM-2 × EC766434, GM-3 × EC766495, GDM-4 × EC766590. Among all the crosses, the cross GDM-4 × EC766590 had significant estimates of inbreeding depression in desired direction for seeds per siliqua and siliqua length indicating the possibility for desired transgressive segregants for the characters under consideration.