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Home > Archive>Volume 24, Issue 5, 2023 >1334-1343. DOI:10.13430/j.cnki.jpgr.20230119001
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Study on Parthenocarpy and Self-incompatibility of Tomato Material 85-6
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Affiliation:

1.College of Horticulture， Qingdao Agricultural University， Qingdao 266109;2.Engineering Laboratory of Genetic Improvement of Horticultural Crops of Shandong Province， Qingdao 266109

Fund Project:

Foundation projects： Shandong Province Agricultural Improved Seed Project（2020LZGC005）；Project of Action Plan of Science and Technology Commissioner（21-1-4-ny-25-nsh）；Shandong Modern Agricultural Industrial Technology System Project（SDAIT-05）；Doctor Start-up Fund from Qingdao Agricultural University（663-1119028）

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    Abstract:

    This study investigated a special tomato inbred line 85-6 with the parthenocarpy and self-incompatibility. Through the observation of flower appearance， pollen viability and ovule development， 85-6 was found with normal flower structure， pollen activity and ovule development， thus ruling out the abortion of pistil or stamen. Based on the fertility variations of self-pollination， and artificially-assisted self-pollination and hybridization experiments at different temperature， 85-6 showed self-incompatibility under normal temperature conditions， and produced seedless fruit after self-pollination， as well as normal hybrid offspring whenever serving as male or female parents. Under temperature stress （daily average temperature <10 ℃ or >35 ℃） at flowering stage， 85-6 became complete pollination and fertilization to obtain seeded fruits， and its offspring seeds showed 29.75% seed germination rate. After emasculation at the bud stage， whenever under normal or lower temperature conditions， t85-6 was able to produce seedless fruit， thus indicating the characteristics of parthenocarpy. Collectively， the material of 85-6， as a newly-identified germplasm showing the parthenocarpy and self-incompatibility， provided a basis for the parthenocarpy and self-incompatibility breeding， and further deciphering the functional mechanisms.

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History
  • Received:January 19,2023
  • Revised:April 20,2023
  • Online: August 30,2023
  • Published: August 30,2023
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