Heat Tolerance and Adaptability to Drought in Sunflower Can Be Influenced by Pollen Selection
2014
Lyakh, V.A. | Totsky, I.V.
The heat tolerance and adaptability to drought of F₂ sporophytic populations after F₁ sunflower pollen heating have been studied. Freshly collected pollen was heated at the temperature of 60°C during 1 and 3 h and used to self-pollinate the emasculated F₁ plants. Half of F₂ seeds were treated with the temperature of 60°C during 15 min before sowing while another was not subjected to high temperature. The number of F₂ flowering plants during 2013 dry summer season was counted. Pollen treatments compared with the control (fresh pollen) significantly increased the number of F₂ plants after seed heating before sowing. In some F₁ hybrids, pollen heating during 1 h was not effective. Pollination of F₁ hybrids with pollen treated with the temperature of 60°C during 1 h compared with fresh pollen increased the number of F₂ plants in dry field conditions. Obtained results show that pollen selection was successful to increase the heat tolerance and adaptability to drought in sunflower.
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