Pakistan edible oil has growing importance
during the last two decades. It is of concern to meet consumption requirements
of growing population, the government has not only efforts for increase in its
domestic production but also spent too much money for edible oil imports
(Ghaffar et al., 1998).
are four major edible oilseed crops in Pakistan that are cottonseed, sunflower,
rapeseed and canola. Total available edible oil during
2015-16 was at 3.726 million tons of which local production contributed 0.462
million tons from all sources which is 14 % of the total consumption and the
rest 86% is imported from other countries and spending Rs. 284.546 billion
every year. Sunflower ranked 2nd
position for oil production (Govt. of Pakistan, 2016-17).
Sunflower is a most important edible oilseed crop,
it is grown over a extensive area. It
has high phenotypic adaptability that can be grown in all environments for
production of grains and also for crop rotation. Sunflower oil has light
taste and appearance and it contains
more vitamin E than any other vegetable (Zaidi et al., 2012).
Genetic diversity provides a chance for plant breeders to improve and
develop new cultivars with desirable characteristics, which include
farmer-preferred traits like yield potential and large seed, etc. and breeders
preferred traits like pest and disease resistance and photosensitivity, etc.
From the beginning of agriculture, natural genetic variability has been
exploited within crop species to meet major food necessity, and now it is being
focused to extra food for growing populations. Availability and access to various genetic sources
will ensure that the worldwide food production network becomes more sustainable
(Govindraj et al., 2014).
plays a key role in the functioning of biosphere (Rees et al., 2010). Analysis
of growth is an descriptive, holistic and integrative approach to interpreting
plant form and function. It uses simple initial data in the form of weights, areas,
volumes and contents of plant components to examine processes within and including
the whole plant. It is now a broadly used tool in such various fields as plant
breeding, plant physiology and plant ecology (Poorter and Garnier, 1996).
in the productivity largely depends on the tendency and intensity of
association between yield component and seed quality traits. Correlation
coefficient quantify interactions between different seed and plant traits and
determines the constituent character which
can help in the selection. Hence, an understanding of degree of association
with seed yield and interrelationship among themselves is essential to bring an
improvement in crop productivity (Uttam et
of genetic variability among sunflower accessions for seedling parameters
of selection criteria on the base of interrelationship among seedling traits
analysis in different sunflower accessions