Photoperiod Insensitivity in Pigeonpea Introgression Lines Derived from Wild <i>Cajanus</i> Species
Pigeonpea is a photoperiod-sensitive crop; therefore, the introgression of photoperiod insensitivity could increase its adaptability to new environments. We determined the effect of extended daylength (ED; 16 h light) on the phenotypical traits of extra-early, early, and mid-early maturing pigeonpea...
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MDPI AG
2022-06-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/12/6/1370 |
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| author | Mohammad Ekram Hussain Shivali Sharma A. John Joel Benjamin Kilian |
| author_facet | Mohammad Ekram Hussain Shivali Sharma A. John Joel Benjamin Kilian |
| author_sort | Mohammad Ekram Hussain |
| collection | DOAJ |
| description | Pigeonpea is a photoperiod-sensitive crop; therefore, the introgression of photoperiod insensitivity could increase its adaptability to new environments. We determined the effect of extended daylength (ED; 16 h light) on the phenotypical traits of extra-early, early, and mid-early maturing pigeonpea introgression lines (ILs) derived from wild <i>Cajanus</i> species belonging to secondary and tertiary gene pools. Plants were grown under natural daylength and extended daylength in a greenhouse. Comparisons of the time of floral bud initiation, days to flowering, plant height, number of branches, and number of leaf nodes on the main stem at flowering revealed photoperiod-insensitive lines. All traits varied widely among the ILs. Analyses of flowering traits revealed large genetic components with low genotype × treatment interactions and high broad-sense heritability. The photoperiod most strongly affected the number of primary branches, followed by plant height. The extended day advanced flowering by approximately four days in extra-early ILs, confirming that these ILs are quantitative, short-day plants. The photoperiod insensitivity index varied from 0.88 in ICPP 171541 (moderately photoperiod sensitive) to 0.99 in ICPP 171546 and ICPP 171561 (photoperiod insensitive). These photoperiod-insensitive extra-early flowering ILs can be used to enrich the genetic diversity of pigeonpea and to develop photoperiod-insensitive cultivars for cultivation in new environments. |
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| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T00:39:16Z |
| publishDate | 2022-06-01 |
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| series | Agronomy |
| spelling | doaj.art-6d54f5f6dd9c4ac9adc21410036f36dd2023-11-23T15:10:38ZengMDPI AGAgronomy2073-43952022-06-01126137010.3390/agronomy12061370Photoperiod Insensitivity in Pigeonpea Introgression Lines Derived from Wild <i>Cajanus</i> SpeciesMohammad Ekram Hussain0Shivali Sharma1A. John Joel2Benjamin Kilian3International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad 502324, IndiaInternational Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad 502324, IndiaDepartment of Plant Biotechnology, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore 641003, IndiaGlobal Crop Diversity Trust, Platz der Vereinten Nationen 7, D-53113 Bonn, GermanyPigeonpea is a photoperiod-sensitive crop; therefore, the introgression of photoperiod insensitivity could increase its adaptability to new environments. We determined the effect of extended daylength (ED; 16 h light) on the phenotypical traits of extra-early, early, and mid-early maturing pigeonpea introgression lines (ILs) derived from wild <i>Cajanus</i> species belonging to secondary and tertiary gene pools. Plants were grown under natural daylength and extended daylength in a greenhouse. Comparisons of the time of floral bud initiation, days to flowering, plant height, number of branches, and number of leaf nodes on the main stem at flowering revealed photoperiod-insensitive lines. All traits varied widely among the ILs. Analyses of flowering traits revealed large genetic components with low genotype × treatment interactions and high broad-sense heritability. The photoperiod most strongly affected the number of primary branches, followed by plant height. The extended day advanced flowering by approximately four days in extra-early ILs, confirming that these ILs are quantitative, short-day plants. The photoperiod insensitivity index varied from 0.88 in ICPP 171541 (moderately photoperiod sensitive) to 0.99 in ICPP 171546 and ICPP 171561 (photoperiod insensitive). These photoperiod-insensitive extra-early flowering ILs can be used to enrich the genetic diversity of pigeonpea and to develop photoperiod-insensitive cultivars for cultivation in new environments.https://www.mdpi.com/2073-4395/12/6/1370photoperiodphotoperiod insensitivity indexintrogression lines (ILs)facultativequantitativewild <i>Cajanus</i> species |
| spellingShingle | Mohammad Ekram Hussain Shivali Sharma A. John Joel Benjamin Kilian Photoperiod Insensitivity in Pigeonpea Introgression Lines Derived from Wild <i>Cajanus</i> Species Agronomy photoperiod photoperiod insensitivity index introgression lines (ILs) facultative quantitative wild <i>Cajanus</i> species |
| title | Photoperiod Insensitivity in Pigeonpea Introgression Lines Derived from Wild <i>Cajanus</i> Species |
| title_full | Photoperiod Insensitivity in Pigeonpea Introgression Lines Derived from Wild <i>Cajanus</i> Species |
| title_fullStr | Photoperiod Insensitivity in Pigeonpea Introgression Lines Derived from Wild <i>Cajanus</i> Species |
| title_full_unstemmed | Photoperiod Insensitivity in Pigeonpea Introgression Lines Derived from Wild <i>Cajanus</i> Species |
| title_short | Photoperiod Insensitivity in Pigeonpea Introgression Lines Derived from Wild <i>Cajanus</i> Species |
| title_sort | photoperiod insensitivity in pigeonpea introgression lines derived from wild i cajanus i species |
| topic | photoperiod photoperiod insensitivity index introgression lines (ILs) facultative quantitative wild <i>Cajanus</i> species |
| url | https://www.mdpi.com/2073-4395/12/6/1370 |
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