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Epistasis in the Inheritance of Quantitative Characters in Jute¹

Inheritance of plant height and earliness was studied in two crosses, ‘0-753’ x ‘Desimasua’ and 0-753 x ‘0-6E,’ of jute (Corchorus olltorius L.) using P₁, P₂, F₁, F₂, B₁. and B₂ progenies. Herltability was found to be 57% and 59% for earliness and 49% and 8% for plant height, respectively, in 0-753 x 0-6E and 0-753 x Desimasua. Over dominance and partial dominance were detected for plant height in 0-753 x Desimasua and 0-753 x 0-6E, respectively, whereas partial dominance was observed for earliness in both crosses. Expected genetic advance in F₃ means over F₂ means under selection suggested that transgressive segregation was expected for both the characters in segregating progenies. Detection and estimation of epistasis indicated that in the cross 0-753 x Desimasua, epistasis was due to additive x dominance effects for the two characters, whereas in 0-753 x 0-6E, epistasis was due to all three types of non-allelic interaction for plant height.

Key Words: Earlines • Plant height • Heritability • Corchorus Olitorius

² Respectively, Professor and former graduate student of the Department of Botany, Rajshahi University, Pakistan.

Received for publication April 11, 1968.