HETEROSIS AND INBREEDING DEPRESSION FOR VEGETATIVE TRAITS IN GROUNDNUT (ARACHIS HYPOGAEA L.)

Article Id: ARCC501 | Page : 36 - 39
Citation :- HETEROSIS AND INBREEDING DEPRESSION FOR VEGETATIVE TRAITS IN GROUNDNUT (ARACHIS HYPOGAEA L.).Legume Research-An International Journal.2012.(35):36 - 39
K. John, P. Raghava Reddy1, K. Hariprasad Reddy2, P. Sudhakar and N.P. Eswar Reddy2
Address : Regional Agricultural Research Station, Tirupati-517 502, India.

Abstract

Among twenty eight F1s studied, twenty F1s exhibited significant positive heterosis over better parent. The F1, TPT-4 x K-1375 expressed the highest significant positive relative heterosis (41.73%) and  heterobeltiosis  (35.09%) with moderate inbreeding depression (11.39%) indicating the presence of additive gene action for the expression of plant height. For number of primary branches per plant, the F1, ICGV-91114 x K-1375 recorded the highest significant positive heterosis over mid-parent (41.68%), heterobeltiosis (22.48%) and standard heterosis (40.35%) with the highest (22.22%) inbreeding depression indicating the chances of getting desirable genotypes through selection from the further segregating generations of this cross.  The F1, ICGV-91114 x K-1375 recorded the highest relative heterosis (469.23%) and heterobeltiosis (428.57%) coupled with high positive inbreeding depression for number of secondary branches per plant indicating the preponderance of additive gene action in the inheritance of this trait.

Keywords

Heterosis Inbreeding depression Heterobeltiosis Vegetative traits Groundnut.

References

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