Journal ArticleDOI
Hybrid seed production in safflower (Carthamus tinctorius) following the induction of male sterility by gibberellic acid
TLDR
The results showed that GA3 could be successfully used as a chemical hybridizing agent in hybrid safflower production.Abstract:
The objective of the present research was to develop an effective and practical method for hybrid seed production in safflower, by inducing male sterility with gibberellic acid (GA3). Seeds of the spiny line ‘5-154’ and the non-spiny variety ‘Dincer 5-118’ were sown in alternate rows and the plants of the non-spiny female variety were exposed to various concentrations of GA3 for male sterility induction. Three successive sprays (75, 82 and 89 days after sowing) of 100 p.p.m. of GA3 to safflower buds of <0.5 cm diameter at a pre-meiotic interphase stage resulted in reduced pollen viability from 81.6-6.7% compared with the control. An average hybrid seed percentage of 80.7% (87.5% in the secondary heads), identified by the use of the spiny-capitulum marker variety ‘5-154′, was obtained. The GA3 treatments did not significantly affect the production of viable achenes. The results showed that GA3 could be successfully used as a chemical hybridizing agent in hybrid safflower production.read more
Citations
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Journal ArticleDOI
Impact of salt stress on photosystem II efficiency and antioxidant enzyme activities of safflower (Carthamus tinctorius L.) cultivars
TL;DR: Considering growth and biochemical and chlorophyll fluorescence parameters with the endogenous defense system, Dincer had a higher withstanding capacity against salinity than the other cultivars.
Journal ArticleDOI
Characterization for Drought Tolerance and Physiological Efficiency in Novel Cytoplasmic Male Sterile Sources of Sunflower (Helianthus annuus L.)
TL;DR: This study carries out a Line × Tester-based genetic study using 19 sunflower genotypes representing, 13 cytoplasmic male sterile (CMS) lines from wild and conventional sources, 2 maintainer lines, and 4 restorer lines to develop sixty F1 hybrids, and the contribution of female parent was more prominent in the expression of traits in hybrids as compared to male parents.
Journal ArticleDOI
Gibberellin-Induced Gene Expression Associated with Cytoplasmic Male Sterility in Sunflower
TL;DR: These results provide the first evidence that expression of CMS-specific orfH522 gene can be induced by GA3 in plant with original fertile cytoplasm and induced male sterility.
Journal ArticleDOI
Ethyloxanilates as specific male gametocides for wheat (Triticum aestivum L.)
Kajal Chakraborty,C. Devakumar +1 more
TL;DR: The efficacy of a new class of male gametocide for wheat (Triticum aestivum L.) is described: ethyloxanilates, the most active example of this class being E4FO, which induces male sterility, specifically, without detectable effects on various agronomic features and female fertility.
Posted ContentDOI
Characterization for Drought Tolerance and Physiological Efficiency in Novel Cytoplasmic Male Sterile Sources of Sunflower (Helianthus annuus L.)
TL;DR: A Line × Tester based genetic study using 19 sunflower genotypes representing, 13 cytoplasmic male sterile (CMS) lines from wild and conventional sources, 2 maintainer lines, and 4 restorer lines provides useful information about the cytopLasmic effects on important sunflower traits and drought stress tolerance when used in the different combinations.
References
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Journal ArticleDOI
The effect of gibberellic acid on male fertility in bread wheat
Noemí Colombo,E. A. Favret +1 more
TL;DR: The critical period for GA3 treatment extended from glume differentiation to premeiotic interphase in the oldest florets of the spike, though differences were found between GA-sensitive and GA-insensitive genotypes in the extension of this period.
Journal ArticleDOI
Yield Reduction in Safflower Hybrids Caused by Female Selfs
A. L. Urie,D. E. Zimmer +1 more
TL;DR: F hybrids of safflower, L., when grown in comparative yield trials with adapted varieties, outyielded ‘Ute,’ the highest yielding variety, by an average of 24%.