STUDIES ON ASSOCIATION OF CAPSAICIN AND OLEORESIN CONTENTS ON INCIDENCE OF ANTHRACNOSE FRUIT ROT AND SEED QUALITY, AND VALIDATION OF DNA MARKERS LINKED TO PUNGENCY IN HOT PEPPER (Capsicum spp.)
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Date
2015-08-06
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
Chilli (Capsicum annuum) in a highly valued spice cum cash crop. India is the
largest producer of chilli in world. Anthracnose fruit rot caused by Colletotrichum Spp. is
most serious disease reducing crop yield and quality. The present studies were carried out
at the College of Agriculture, UAS, GKVK, Bengaluru. The results revealed that, days to
fruiting ranged from (22-92 days), test weight (0.2972-9.74 g), germination (42-96 %),
SVI-I (283-1489), seed protein (6.4-17.4 μg g-1), capsaicin (27-417 μg g-1), oleoresin 3-
23 %, ASTA colour value (2-16) and seed infection (0-82 %). The capsaicin content was
negatively correlated with anthracnose disease and oleoresin was positively correlated
with seed quality. Seed treatment with iprodine+ carbendizim @ 0.4 (%) eliminated
anthracnose seed infection and improved seed quality. Storing dry chilli fruits in
aluminium foils retained maximum seed germination (%) compared to vapour pervious
containers. seed germination, test weight, TDH activity, seed protein, capsaicin and
oleoresin decreased and seedling vigour and EC increased with storage period. Genotypes
amplified single dominant band at 100 Kb with marker 7F/15R except AR-75, Byadagi
Kaddi, Dyavanur Delux, G4, Gouribidanur Local, HMT-1 for pungency. A low pungent
parent Paprika from C. annuum was hybridized to highly pungent parent C. chinense
Assam Bhut Jolokia to produce inter specific hybrid and the six generation mean analysis
revealed that, higher seedling length and the higher seedling emergence were
predominantly under the control of genes with dominance effect and the dominance
effect were unidirectional as evidenced by higher magnitudes of dominance gene effects.
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