<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>“Autonomous fruit set” refers to self-pollination and fruit set without pollen vectors such as vibration or insects. Autonomous fruit set under high-temperature stress is an important breeding goal as climate change can reduce fruit yields in <italic>Capsicum</italic>. We screened <italic>Capsicum</italic> cultivars for autonomous fruit set ability in a greenhouse environment and investigated pollen germination, viability, pollen grains number, chlorophyll fluorescence (Fv/Fm), style length, anther cone length, and anthesis stage under high temperatures in order to identify indicator traits for screening more genotypes with autonomous fruit set ability. The fruit set of the ‘Takanotsume’ (57.7 ± 20.6%) and ‘Goshiki Kyokko’ (52.2 ± 14.2%) cultivars (both <italic>C. annuum</italic>) were higher than those of other cultivars. Correlation analysis showed that pollen germination had the highest correlation with fruit set in <italic>C. annuum</italic> cultivars (r = 0.63). These results indicate that ‘Takanotsume’ and ‘Goshiki Kyokko’ are useful cultivars for novel breeding programs focusing on autonomous fruit sets under high temperatures, and pollen germination in <italic>C. annuum</italic> was a convincing candidate for an indicator trait of autonomous fruit set ability under high temperatures.</p>
</abstract>

“Autonomous fruit set” refers to self-pollination and fruit set without pollen vectors such as vibration or insects. Autonomous fruit set under high-temperature stress is an important breeding goal as climate change can reduce fruit yields in Capsicum. We screened Capsicum cultivars for autonomous fruit set ability in a greenhouse environment and investigated pollen germination, viability, pollen grains number, chlorophyll fluorescence (Fv/Fm), style length, anther cone length, and anthesis stage under high temperatures in order to identify indicator traits for screening more genotypes with autonomous fruit set ability. The fruit set of the ‘Takanotsume’ (57.7 ± 20.6%) and ‘Goshiki Kyokko’ (52.2 ± 14.2%) cultivars (both C. annuum) were higher than those of other cultivars. Correlation analysis showed that pollen germination had the highest correlation with fruit set in C. annuum cultivars (r = 0.63). These results indicate that ‘Takanotsume’ and ‘Goshiki Kyokko’ are useful cultivars for novel breeding programs focusing on autonomous fruit sets under high temperatures, and pollen germination in C. annuum was a convincing candidate for an indicator trait of autonomous fruit set ability under high temperatures.

Indicator Candidate Traits for Autonomous Fruit Set Ability Under High Temperatures in <italic>Capsicum</italic>

Journal of Horticultural Research

This work is licensed under the Creative Commons Attribution 4.0 International License.

Indicator Candidate Traits for Autonomous Fruit Set Ability Under High Temperatures in 

“Autonomous fruit set” refers to self-pollination and fruit set without pollen vectors such as vibration or insects. Autonomous fruit set under...

Indicator Candidate Traits for Autonomous Fruit Set Ability Under High Temperatures in Capsicum

Publicado en línea: 05 ene 2023

Páginas: 105 - 116

Recibido: 01 jul 2022

Aceptado: 01 nov 2022

DOI: https://doi.org/10.2478/johr-2022-0017

Palabras clave
chili pepper, fruit set, greenhouse cultivation, heat stress, ornamental pepper, pollen germination, sweet pepper

© 2022 Akira Yamazaki et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Indicator Candidate Traits for Autonomous Fruit Set Ability Under High Temperatures in Capsicum

Publicado en línea: 05 ene 2023

Páginas: 105 - 116

Recibido: 01 jul 2022

Aceptado: 01 nov 2022

DOI: https://doi.org/10.2478/johr-2022-0017

Palabras clavechili pepper, fruit set, greenhouse cultivation, heat stress, ornamental pepper, pollen germination, sweet pepper

© 2022 Akira Yamazaki et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Palabras clave
chili pepper, fruit set, greenhouse cultivation, heat stress, ornamental pepper, pollen germination, sweet pepper