Ntare, B.R. and Williams, J.H. (1998) Heritability of components of a simple physiological model for yield in groundnut under semiarid rainfed conditions. Field Crops Research, 58 (1). pp. 25-33.
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Abstract
Heritabilities of yield components of groundnut (crop growth rate (C), reproductive duration (DR) and partitioning (p)) were estimated, and their predictive value in early generations was determined. Forty bulk populations and nine parental lines were evaluated in replicated trials in 1992 (F2), 1993 (F3) and 1994 (F4) at three contrasting locations in Niger. Physiological components of yield were estimated from final yield and biomass as well as data on flowering and maturity. Differences were observed among populations for pod yield and model components. The effects of locations were significant (P<0.01) for C, p and DR in F2 and F3 but nonsignificant for yield and C in F4. Heritabilities were estimated by parent-offspring regression of F3 on F2 and F4 on F3. Heritability estimates for C, p, DR and yield based on the F2:F3 regression were 0.10, 0.45, 0.10 and 0.16, respectively. Heritabilities based on F3:F4 regression were 0.20 for C, 0.46 for p, 0.14 for DR and 0.57 for yield. It is concluded that none of the yield-model traits had larger heritability than yield and that selection for these traits in segregating bulk populations is difficult
| Item Type: | Article |
|---|---|
| Author Affiliation: | ICRISAT, Sahelian Centre, BP 12404 Niamey, Niger |
| Subjects: | Plant Production Crop Improvement > Plant Breeding |
| Divisions: | Groundnut |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 07 Jun 2011 10:58 |
| Last Modified: | 07 Jun 2011 10:58 |
| Official URL: | http://dx.doi.org/10.1016/S0378-4290(98)00083-5 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/2131 |
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