Roberts, E.H and Hadley, P. and Summerfield, R.J. (1985) Effects of temperature and photoperiod on flowering in chickpeas (Cicer arietinum L.). Annals of Botany , 55 (6). pp. 881-892.
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Abstract
Factorial combinations of 2 photoperiods (12 and 15 h), 3 day temperatures (20, 25 and 30°C) and 3 night temperatures (10, 15 and 20°C) were imposed on nodulated plants of 9 genotypes, varying in maturity and seed type, grown in pots in growth cabinets. The times to first appearance of open flowers were recorded. For all genotypes, the rates of progress towards flowering (the reciprocals of the times taken to flower) were linear functions of mean temperature. There were no interactions between mean temperature and photoperiod but the longer photoperiod increased the rate of progress towards flowering. These effects were independent of both radiation integral (the product of irradiance and photoperiod) and the vegetative stature of the plant. Taken in conjunction with evidence from work on other long-day species, it is suggested that the photothermal response of flowering in chickpeas, over the range of environments normally experienced by the crop, may be described by the equation 1/f = a + bt̄ + cp in which f is the number of days from sowing to first flower, t̄ is the mean temperature and p is the photoperiod. The values of the constants a, b and c vary between genotypes. Genotypes ILC195 and ICC5810, insensitive to temperature and photoperiod, respectively, had the lowest values for b and c, respectively, suggesting that this equation provides a basis for screening genotypes for sensitivity to temperature and photoperiod.ADDITIONAL ABSTRACT:Factorial combinations of 2 photoperiods (12 and 15 h), 3 day temp. (20, 25 and 30°C) and 3 night temp. (10, 15 and 20°) were imposed on nodulated plants of 9 chickpea genotypes grown in pots in growth cabinets. The times to first appearance of open flowers were recorded. For all genotypes, the rates of progress towards flowering (the reciprocals of the times taken to flower) were linear functions of mean temp. There were no interactions between mean temp. and photoperiod but the longer photoperiod increased the rate of progress towards flowering. These effects were independent of both radiation integral (the product of irradiance and photoperiod) and the vegetative stature of the plant. Taken in conjunction with evidence from work on other long-day species, it is suggested that the photo-thermal response of flowering in chickpeas, over the range of environments normally experienced by the crop, may be described by the equation: 1/f = a + bt̄ + cp in which f is the number of days from sowing to first flower, t̄ is mean temp. and p is photoperiod. The values of the constants a, b and c vary between genotypes and provide the basis for screening genotypes for sensitivity to temp. and photoperiod.
| Item Type: | Article |
|---|---|
| Author Affiliation: | Dep. Agric. & Hort., Univ. Reading, Shinfield Grange, Cutbush Lane, Shinfield, Reading, Berks RG2 9AB, United Kingdom. |
| Subjects: | Crop Improvement Crop Improvement > Genetics/Genomics Crop Improvement > Plant Breeding Plant Physiology and Biochemistry > Plant Physiology Plant Physiology and Biochemistry > Biochemistry Environmental Science > Environment |
| Divisions: | Chickpea |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 31 Oct 2010 22:35 |
| Last Modified: | 31 Oct 2010 22:35 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/322 |
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