Phenetic Analysis of Cultivated Black Pepper (Piper nigrum L.) in Malaysia
Phenetic analysis of all the black pepper cultivars in Malaysia is crucial to determine the morphological difference among them. The objective of this study is to ascertain the morphological distinctness and interrelationships among the cultivars to ensure registration of each variety under the Plan...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | International Journal of Agronomy |
| Online Access: | http://dx.doi.org/10.1155/2018/3894924 |
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| author | Y. S. Chen M. Dayod C. S. Tawan |
| author_facet | Y. S. Chen M. Dayod C. S. Tawan |
| author_sort | Y. S. Chen |
| collection | DOAJ |
| description | Phenetic analysis of all the black pepper cultivars in Malaysia is crucial to determine the morphological difference among them. The objective of this study is to ascertain the morphological distinctness and interrelationships among the cultivars to ensure registration of each variety under the Plant Variety Protection Act, as a prerequisite toward implementation of a monovarietal farm policy in the future. Cluster analysis revealed that cultivars “Semongok Aman” and “Semongok 1” have high distinctness values for identification; thus, varietal diagnosis for the two cultivars is easy. Cultivars “Nyerigai,” “India,” “Semongok Perak,” and “Semongok Emas” were grouped in the most diverse clusters among the ten cultivars studied. The four cultivars have a similarity index as high as 92%; however, investigation of leaf width, leaf width-length ratio, seed weight, and conversion rate (fresh to black pepper) gives the ability to determine the characteristic differences. Cultivars “Lampung Daun Lebar” and “Yong Petai” have a similarity of 96%; however, the two showed distinctive differences in leaf width, leaf length-width ratio, spike thickness, and spike length characteristics. On the contrary, cultivars “Kuching” and “Sarikei” showed the highest similarity index, at 98%, and thus are among the most difficult cultivars to diagnose the morphological difference. However, the principle component analysis showed that the fruit size and seed diameter were the important diagnostic key characteristics. Overall, the leaf width, leaf width-length ratio, fruit spike, and conversion rate characteristics are among the key characteristics to differentiate among cultivars of black pepper in Malaysia. At the same time, the principle component analysis carried out has enlightened some interrelationships on the morphological characteristics between cultivars. This information is crucial for the future of the plant varietal improvement program in Malaysia. |
| format | Article |
| id | doaj-art-64e951adc5934224ae8f888be3bbc11d |
| institution | Kabale University |
| issn | 1687-8159 1687-8167 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Agronomy |
| spelling | doaj-art-64e951adc5934224ae8f888be3bbc11d2025-02-03T01:02:23ZengWileyInternational Journal of Agronomy1687-81591687-81672018-01-01201810.1155/2018/38949243894924Phenetic Analysis of Cultivated Black Pepper (Piper nigrum L.) in MalaysiaY. S. Chen0M. Dayod1C. S. Tawan2Malaysian Pepper Board, Jalan Utama, Pending Industrial Area, P.O. Box 1653, Kuching, Sarawak 93916, MalaysiaAgriculture Research Centre, Semongok, P.O. Box 977, Kuching, Sarawak 93720, MalaysiaFaculty of Resource Science and Technology, Universiti Malaysia Sarawak, Jalan Datuk Mohd Musa, Kota Samarahan, Sarawak 94300, MalaysiaPhenetic analysis of all the black pepper cultivars in Malaysia is crucial to determine the morphological difference among them. The objective of this study is to ascertain the morphological distinctness and interrelationships among the cultivars to ensure registration of each variety under the Plant Variety Protection Act, as a prerequisite toward implementation of a monovarietal farm policy in the future. Cluster analysis revealed that cultivars “Semongok Aman” and “Semongok 1” have high distinctness values for identification; thus, varietal diagnosis for the two cultivars is easy. Cultivars “Nyerigai,” “India,” “Semongok Perak,” and “Semongok Emas” were grouped in the most diverse clusters among the ten cultivars studied. The four cultivars have a similarity index as high as 92%; however, investigation of leaf width, leaf width-length ratio, seed weight, and conversion rate (fresh to black pepper) gives the ability to determine the characteristic differences. Cultivars “Lampung Daun Lebar” and “Yong Petai” have a similarity of 96%; however, the two showed distinctive differences in leaf width, leaf length-width ratio, spike thickness, and spike length characteristics. On the contrary, cultivars “Kuching” and “Sarikei” showed the highest similarity index, at 98%, and thus are among the most difficult cultivars to diagnose the morphological difference. However, the principle component analysis showed that the fruit size and seed diameter were the important diagnostic key characteristics. Overall, the leaf width, leaf width-length ratio, fruit spike, and conversion rate characteristics are among the key characteristics to differentiate among cultivars of black pepper in Malaysia. At the same time, the principle component analysis carried out has enlightened some interrelationships on the morphological characteristics between cultivars. This information is crucial for the future of the plant varietal improvement program in Malaysia.http://dx.doi.org/10.1155/2018/3894924 |
| spellingShingle | Y. S. Chen M. Dayod C. S. Tawan Phenetic Analysis of Cultivated Black Pepper (Piper nigrum L.) in Malaysia International Journal of Agronomy |
| title | Phenetic Analysis of Cultivated Black Pepper (Piper nigrum L.) in Malaysia |
| title_full | Phenetic Analysis of Cultivated Black Pepper (Piper nigrum L.) in Malaysia |
| title_fullStr | Phenetic Analysis of Cultivated Black Pepper (Piper nigrum L.) in Malaysia |
| title_full_unstemmed | Phenetic Analysis of Cultivated Black Pepper (Piper nigrum L.) in Malaysia |
| title_short | Phenetic Analysis of Cultivated Black Pepper (Piper nigrum L.) in Malaysia |
| title_sort | phenetic analysis of cultivated black pepper piper nigrum l in malaysia |
| url | http://dx.doi.org/10.1155/2018/3894924 |
| work_keys_str_mv | AT yschen pheneticanalysisofcultivatedblackpepperpipernigrumlinmalaysia AT mdayod pheneticanalysisofcultivatedblackpepperpipernigrumlinmalaysia AT cstawan pheneticanalysisofcultivatedblackpepperpipernigrumlinmalaysia |