Pak. J. Bot., 37(1): 71-77, 2005. | Back to Contents | ||||
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Updated: 09-07-09 | ||||
GENETIC DIVERSITY IN PISUM SATIVUM AND A STRATEGY FOR INDIGENOUS BIODIVERSITY CONSERVATION ABDUL GHAFOOR * , ZAHOOR AHMAD AND RASHID ANWAR
Abstract: Pisum sativum germplasm collected from Pakistan was evaluated
for agronomic traits and analyzed for biodiversity within each district.
The differences proved its validity in substantiating the postulated
regions of diversity or gene centres. Migration of landraces into new
regions, followed by some degree of contamination by mixture or out
crossing with other landraces were observed that might be due to frequent
exchange of germplasm or transportation of grains from one place to
others. The areas with a high level of stress is expected to present
tolerance to environmental stresses, but homogeneous mixtures that needs
less extensive sampling for genetic resources conservation purposes.
The study confirmed the existence of a wealth of phenotypic divergence
in the local pea germplasm and identified pure-lines are suggested to
be utilized in crop improvement through simple selection or using in
hybrid program. The variation appears attributable to different districts
without influence that how frequently area was explored. Further collecting
missions to main pea areas with greater diversity could concentrate
efforts on sampling as many geographically and ecologically distinct
areas as possible, rather than collecting extensively from fields close
to motorable roads. The germplasm with high mean values along with medium
to high genetic variance should be exploited through simple selection.
Plant Genetic Resources Program, Institute of Agri Biotechnology and
Genetic Resources,
National Agricultural Research Centre, Islamabad, Pakistan. |
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