Developing of a bold-seeded tetraploid lentil line [Lens culinaris]
1988
Singh, R.K. | Raghuvanshi, S.S. (Lucknow Univ. (India). Plant Genetics Unit)
A polyploid breeding programme was initiated to produce a bold-seeded variety with good yield. The tetraploid plant was raised by treating shoot tips at the two leaf stage. Meiotic studies of the C2, C3, and C4 generations showed that the frequency of multivalent configurations decreased with the passage of the generations, while bivalent frequency increased. Chiasma frequency/chromosome also followed the same pattern as bivalents and had positive correlations with pollen fertility and number of seeds/plant. Autotetraploid plants were more robust and vigorous for morphological characters. The percent diploid value for yield contributing components increased over the generations. The C3 and C4 generations showed great variation for different quantitative characters which provide potential for selection to improve the yield of autotetraploid plants in advanced generations. A plant was selected in the C4 generation which had a higher seed yield (8.9 g) than the diploid control (8.3 g). Thus, polyploid breeding in lentil may be successful and after selection for a few generations the yield can be improved with the whole population of the bold-seeded type
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