Cytomorphological Studies in Gamma-ray Induced Autotriploids of Capsicum annuum L

Cytomorphological Studies in Gamma-ray Induced Autotriploids of Capsicum annuum L

Six autotriploids were isolated from the progeny of an M2 line of Capsicum annuum L. var. PC1 whose progenitor was an M1 semisterile (induced by 40 kR gamma-ray). These triploids were characterised by large sized dark green leaves, stomata, pollen, flower and fruit growth besides longer petioles and...

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Veröffentlicht in:CYTOLOGIA 2003, Vol.68(1), pp.45-50
Hauptverfasser: Kumar, O. Aniel, Rao, K. G. Raja
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autotriploids
Capsicum annuum
cytomorphology
gamma-rays
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description Six autotriploids were isolated from the progeny of an M2 line of Capsicum annuum L. var. PC1 whose progenitor was an M1 semisterile (induced by 40 kR gamma-ray). These triploids were characterised by large sized dark green leaves, stomata, pollen, flower and fruit growth besides longer petioles and greater plant spread. Nevertheless, these bear fewer branches, shorter internodes, fewer fruits and seeds besides delayed growth and flowering compared to their M1 progenitor and the control. The mean chiasma frequencies in the triploids were significantly less than 1 1/2 times to that of their M1 progenitor and their control. Lower pollen and seed fertilities recorded in them was mostly due to meiotic abnormalities. The possible reasons for differences in morphometrics and cytological features in the autotriploids recorded earlier and now are suggested.
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subjects autotriploids
Capsicum annuum
cytomorphology
gamma-rays
title Cytomorphological Studies in Gamma-ray Induced Autotriploids of Capsicum annuum L
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