Abstract
The variation for embryo production in anther ofSolanum phureja was examined as a function of maximum greenhouse temperature prior to bud harvest and innate responsiveness among anthers within a bud. Four clones ofS. phuyreja were grown in a greenhouse under a 16-h photoperiod. The temperature was monitored continuously. Buds (60 per day on 10 days) were collected and the anthers cultured in two groups of five flasks (30 anthers per flask). In the first group, each flask contained the 30 anthers from six buds; in the second group, each flask contained one anther from each of 30 buds. Significantly smaller coefficients of variation were observed for the second group, suggesting that variation for embryogenic capcity among buds was greater than that among anthers within a bud. Variation in embryo yield as a function of greenhouse temperature was examined by stepwise regression analysis. Embryogenic capacity of one clone was adversely affected by high temperatures (31–37°C) that occurred two and seven days before bud harvest. However, similarly high temperatures appeared to enhance the androgenic response of another clone. Conversion of anther-derived embryos over three subcultures to fresh regeneration medium was examined as a function of anther donor or clone, cold pretreatment of embryos, and morphological classification of embryos. Only clonal origin significantly affected conversion rate which ranged from 12.5% to 46.0%. Conversion rate declined on each serial subculture.
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Abbreviations
- BA:
-
N6-benzyladenine
- GA3 :
-
gibberellic acid, IAA-indole-3-acetic acid
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Snider, K.T., Veilleux, R.E. Factors affecting variability in anther culture and in conversion of androgenic embryos ofSolanum phureja . Plant Cell Tiss Organ Cult 36, 345–354 (1994). https://doi.org/10.1007/BF00046092
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DOI: https://doi.org/10.1007/BF00046092