Heterosis and Inbreeding Depression in Safflower,Carthamus tinctorius L. 216
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Author:D. Shivani, Ch. Sreelakshmi and C.V. Sameer Kumar
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:98, Issue:jul-sep
DOI: https://doi.org/10.29321/MAJ.10.100280
Abstract
Heterosis and inbreeding depression in 10 crosses derived from 7 diverse parents and
genetic variability studies in safflower was carried out during rabi 2009-10. The experimental
material comprising of 20 populations and 7 parents for eight different quantitative characters
revealed considerable amount of genetic variation for all the characters studied. Most of the
characters were less influenced by the environment as minor differences were recorded
between genotypic and phenotypic coefficients of variation. High heritability with high genetic
advance was observed for number of capsules per plant, number of seeds per capitulum,
test weight and seed yield which might be due to additive gene effects. Heterosis and
inbreeding depression was observed positive in direction for most of the characters studied.
Maximum heterosis was recorded for number of seeds per capitulum followed by number
of capitula per plant and seed yield.
Key words : Safflower, heterosis, inbreeding depression