Indian Society of Genetics & Plant Breeding

Response to selection in F2, in the F5 generation in Indian mustard [Brassica juncea (L.) Czern & Coss.]

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Response of selection in F2 generation for main shoot
length, seeds per siliqua, seed mass and seed yield was
studied in F
s generation. Observations were recorded on
individual plant basis in F
2 generation of 3 crosses of
Indian mustard
(B. juncea L.) for each trait. Five plants
with high and five with low values were selected for each
trait. On the other hand a bulk was constituted by taking
one seed from each plant in each cross. These selected
plants as well as the constructed bulks were raised to
advance from F
3 to F4 generation. In Fs generation,
comparisons were made between high and low selections
for each trait as well as between high selection and bulk.
It was observed that differences between high and low
selection were non-significant for all traits except seed
mass. On the other hand mean values under bulk were
comparable to that of high selection group for each trait.
Bulk was advised to be followed in early generation.
Transgressive segregants were more frequent for main
shoot length; seeds per siliqua and seed yield than for
seed mass. The change in relationship between seed
mass and seeds per siliqua from F
2 to Fs turned to be
negative.
  

Keywords: Indian mustard, early generation selection, realized heritability, intergeneration correlation

Info

Year: 2005
Volume: 65
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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