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The effect of sowing date and photoperiod on panicle morphology in naked oats (Avena nuda)
Author(s) -
JENKINS G.
Publication year - 1973
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1973.tb01312.x
Subject(s) - biology , panicle , photoperiodism , cultivar , sowing , avena , inflorescence , agronomy , horticulture , botany
SUMMARY Variations in panicle morphology in different environments were investigated for eight cultivars of naked oats (Avena nuda) and two cultivars of husked oats (A. sattva) in two experiments. The first experiment involved successional sowings in the glasshouse at monthly intervals from February to June. In the second experiment, the plants were grown continuously under constant photoperiods of 9, 11, 13 and 15 h. All the cultivars were found to be photoperiod sensitive, with Victory showing the greatest reduction in time to panicle emergence with increasing photoperiod. The proportion of multiflorous spikelets in all the cultivars of A. nuda except Nuprime and Laurel was greatest at constant photoperiods below 15 h. With successional sowings the proportion of multiflorous spikelets increased until mid April and thereafter decreased. The proportion of husked grains in the A. nuda cultivars was not markedly affected by variation of sowing date or photoperiod except for an increase in the variety Balkanischer following early sowing and subjection to a 15 h photoperiod. Under certain photoperiod treatments, some A. nuda varieties had a very low proportion of multiflorous spikelets but produced completely naked grain. The implication of these results in studies of the A. nuda genotype is discussed.