Association pattern among the yield attributes in varieties and hybrids of sunflower (Helianthus annuus L.)
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Author: N. MANIVANNAN, R. KARTHIKA, B.PUNITHA, P. VINDHIYAVARMAN AND V. MURALIDHARAN,
p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 94, Issue: jan-jun,
DOI:https://doi.org/10.29321/MAJ.10.100637
Abstract
Three varieties namely CO 4, Morden, COSFV 5 and two hybrids TCSH
1 and KBSH 44 were selected for the study. Simple correlation coefficients were
estimated among characters for each variety and hybrids separately. Two traits viz.,
seed yield and 100-seed weight are important selection indices for the improvement
of oil yield improvement in respect of both varieties and hybrids. Thalamus weight
can be considered as a selection index for the improvement of seed yield and oil yield
in respect of hybrids only. Like wise, the oil content is an important selection index
for the oil yield improvement in respect of varieties only. It can also be inferred
that the results obtained from the association analysis of data on varieties and hybrids
together will give ambiguous results and have an adverse impact on the yield improvement
programme. Hence computing separate association analysis for each variety and hybrid
is always desirable to identify selection indices for the improvement of sunflower
Keywords: Sunflower, correlation, varieties and hybrids, selection index
