Indian Society of Genetics & Plant Breeding

Inheritance of photoperiod sensitivity in jute (Corchorus olitorius L.)

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Seeds of two parents (German - a photoperiod insensitive
mutant and JRO 7835 - a photoperiod sensitive variety),
F1, F2, F3, BC1 and BC2 were sown in the field in natural
condition on the 15th of both February and May (short
and long day period respectively). The mutant and F1
hybrids flowered after a fixed period of 35 and 67 days
respectively irrespective of sowing time whereas the other
parent (JRO-7835) being photoperiod sensitive flowered
after 42 and 104 days for sowing in February and May
respectively. The F2 population showed three. !,iistinct
groups with respect to flowering habit in the ratio of
1:2:1. (mutant: 2F1 : JRO 7835). The backross population
exhibited segregation in 1:1 ratio. F3 population had three
groups and out of that two were true breeding and the
rest group segregated in 1:2:1 ratio for sowing in both
February and May. The segregation patterns showed that
photo-period sensitivity is a simple monogenic trait (PPS)
and it is incompletely dominant over photoperiod
insensitivity (pps).

Keywords: Jute, photo-period sensitivity, inheritance


Year: 2001
Volume: 61
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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