Author (S): U. Sarker*, M. R. Karim, M. M. Rashid, and
A. C. Deb
*Corresponding author;
E-mail: upama.sarker@yahoo.com
Abstract
The present investigation deals with studies of
heterosis and inbreeding depression. Six irradiated lentil line considered as
material for this investigation. Seeds were shown in rows of the plots of the
field. After attaining all lines to flower hybridization was brought out to
produce F1 seeds. Emasculation and artificial pollination were
performed for carrying out hybridization. After artificial pollination, pods
with labels were collected when those were fully ripe. Seeds of all crosses of lentil were shown
randomly in rows of replication to produce F2 seed. Data of six
quantitative characters were collected on individual plant basis. Data were
measured and recorded on the following characters, Date of first flower (DFF),
Plant height at first flower (PHFF), Number of primary branches at first flower
(NPBFF), Number of secondary branches at first flower (NSBFF), Plant area per
plant (PAPP) and Number of secondary branches at maximum flower (NSBMF). In
this analysis heterosis and inbreeding depression were found to be
non-significant for all the characters and also they were observed as positive
and negative. Both are useful in crop improvement. Depending upon the breeding
objectives, in general positive heterosis is desired for yield and negative
heterosis is for earliness.
