The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (<i>Capsicum annuum</i> L.)
Pepper plants are subject to complex environmental factors including abiotic and biotic stresses in fields, as well as the significant effects of climate changes, including low and high temperatures. Low temperature stress in the growth and development of pepper plants is one of the most critical is...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/11/10/1986 |
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| author | Sherzod Nigmatullayevich Rajametov Kwanuk Lee Hyo-Bong Jeong Myeong-Cheoul Cho Chun-Woo Nam Eun-Young Yang |
| author_facet | Sherzod Nigmatullayevich Rajametov Kwanuk Lee Hyo-Bong Jeong Myeong-Cheoul Cho Chun-Woo Nam Eun-Young Yang |
| author_sort | Sherzod Nigmatullayevich Rajametov |
| collection | DOAJ |
| description | Pepper plants are subject to complex environmental factors including abiotic and biotic stresses in fields, as well as the significant effects of climate changes, including low and high temperatures. Low temperature stress in the growth and development of pepper plants is one of the most critical issues, and directly impacts the crop yield and productivity of pepper plants. Therefore, it is essential to select and breed low temperature-(LT) tolerant pepper (<i>Capsicum annuum</i> L.) cultivars. This research was conducted to assess the agronomical traits of 39 pepper accessions belonging to the chili and bell fruit varieties which were cultivated under two different night temperature set-points: at 15 °C for a suboptimal temperature (CT) and at 10 °C for a low temperature (LT). The plant heights (PH) of most pepper accessions in a LT were significantly decreased compared to those in a CT. The stem diameter (SD) and the length of main axis (LMA) varied depending on the genotypes under LT. Moreover, the number of flowers (NFL), total number of fruits (NFR), fruit yield (FY), fruit fresh weight (FFW), fruit length (FL), fruit diameter (FD), and number of seeds in a fruit (NSF) remarkably declined in a LT compared to in a CT. The evaluated agronomical traits between LT and CT were further applied for the correlation analysis, principal component analysis (PCA), and hierarchical cluster analysis. Notably, the FY trait was correlated with other reproductive traits including NFR, FFW, FD, and FL on the positive directions and thirty-nine LT-treated pepper accessions were clustered into seven groups by the hierarchical clustering analysis. The selected accessions were primarily involved in the positive trends with the reproductive index including NFR, FL, FD, and FFW traits and could be used for pepper breeding programs to develop LT-tolerant cultivars. |
| first_indexed | 2024-03-10T06:47:42Z |
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| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T06:47:42Z |
| publishDate | 2021-09-01 |
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| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-d628858474bb42f4b8bfe98694b23cea2023-11-22T17:06:25ZengMDPI AGAgronomy2073-43952021-09-011110198610.3390/agronomy11101986The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (<i>Capsicum annuum</i> L.)Sherzod Nigmatullayevich Rajametov0Kwanuk Lee1Hyo-Bong Jeong2Myeong-Cheoul Cho3Chun-Woo Nam4Eun-Young Yang5National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, KoreaNational Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, KoreaNational Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, KoreaNational Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, KoreaNational Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, KoreaNational Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, KoreaPepper plants are subject to complex environmental factors including abiotic and biotic stresses in fields, as well as the significant effects of climate changes, including low and high temperatures. Low temperature stress in the growth and development of pepper plants is one of the most critical issues, and directly impacts the crop yield and productivity of pepper plants. Therefore, it is essential to select and breed low temperature-(LT) tolerant pepper (<i>Capsicum annuum</i> L.) cultivars. This research was conducted to assess the agronomical traits of 39 pepper accessions belonging to the chili and bell fruit varieties which were cultivated under two different night temperature set-points: at 15 °C for a suboptimal temperature (CT) and at 10 °C for a low temperature (LT). The plant heights (PH) of most pepper accessions in a LT were significantly decreased compared to those in a CT. The stem diameter (SD) and the length of main axis (LMA) varied depending on the genotypes under LT. Moreover, the number of flowers (NFL), total number of fruits (NFR), fruit yield (FY), fruit fresh weight (FFW), fruit length (FL), fruit diameter (FD), and number of seeds in a fruit (NSF) remarkably declined in a LT compared to in a CT. The evaluated agronomical traits between LT and CT were further applied for the correlation analysis, principal component analysis (PCA), and hierarchical cluster analysis. Notably, the FY trait was correlated with other reproductive traits including NFR, FFW, FD, and FL on the positive directions and thirty-nine LT-treated pepper accessions were clustered into seven groups by the hierarchical clustering analysis. The selected accessions were primarily involved in the positive trends with the reproductive index including NFR, FL, FD, and FFW traits and could be used for pepper breeding programs to develop LT-tolerant cultivars.https://www.mdpi.com/2073-4395/11/10/1986chili and bell pepperlow temperature stressvegetative and reproductive traitspepper breedingPCAhierarchical cluster analysis |
| spellingShingle | Sherzod Nigmatullayevich Rajametov Kwanuk Lee Hyo-Bong Jeong Myeong-Cheoul Cho Chun-Woo Nam Eun-Young Yang The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (<i>Capsicum annuum</i> L.) Agronomy chili and bell pepper low temperature stress vegetative and reproductive traits pepper breeding PCA hierarchical cluster analysis |
| title | The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (<i>Capsicum annuum</i> L.) |
| title_full | The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (<i>Capsicum annuum</i> L.) |
| title_fullStr | The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (<i>Capsicum annuum</i> L.) |
| title_full_unstemmed | The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (<i>Capsicum annuum</i> L.) |
| title_short | The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (<i>Capsicum annuum</i> L.) |
| title_sort | effect of night low temperature on agronomical traits of thirty nine pepper accessions i capsicum annuum i l |
| topic | chili and bell pepper low temperature stress vegetative and reproductive traits pepper breeding PCA hierarchical cluster analysis |
| url | https://www.mdpi.com/2073-4395/11/10/1986 |
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