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Photoperiod Insensitivity in Pigeonpea Introgression Lines Derived from Wild Cajanus Species.
- Source :
-
Agronomy . Jun2022, Vol. 12 Issue 6, p1370. 14p. - Publication Year :
- 2022
-
Abstract
- 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 Cajanus 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SPECIES
*PIGEON pea
*GENETIC variation
*HERITABILITY
Subjects
Details
- Language :
- English
- ISSN :
- 20734395
- Volume :
- 12
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Agronomy
- Publication Type :
- Academic Journal
- Accession number :
- 157639446
- Full Text :
- https://doi.org/10.3390/agronomy12061370