Mindayea, T.T. and Macec, E.S. and Godwind, I.D. and Jordana, D.R.
(2016)
Heterosis in locally adapted sorghum genotypes and
potential of hybrids for increased productivity in
contrasting environments in Ethiopia.
The Crop Journal, 4 (6).
pp. 479-489.
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Abstract
Increased productivity in sorghum has been achieved in the developed world using hybrids.
Despite their yield advantage, introduced hybrids have not been adopted in Ethiopia due to the
lack of adaptive traits, their short plant stature and small grain size. This studywas conducted
to investigate hybrid performance and the magnitude of heterosis of locally adapted genotypes
in addition to introduced hybrids in three contrasting environments in Ethiopia. In total, 139
hybrids, derived from introduced seed parents crossed with locally adapted genotypes and
introduced R lines, were evaluated. Overall, the hybrids matured earlier than the adapted
parents, but had higher grain yield, plant height, grain number and grain weight in all
environments. The lowland adapted hybrids displayed a mean better parent heterosis (BPH) of
19%, equating to 1160 kg ha−1 and a 29% mean increase in grain yield, in addition to increased
plant height and grain weight, in comparison to the hybrids derived fromthe introduced R lines.
Themean BPH for grain yield for the highland adapted hybridswas 16% in the highland and 52%
in the intermediate environment equating to 698 kg ha−1 and 2031 kg ha−1
, respectively, in
addition to increased grain weight. The magnitude of heterosis observed for each hybrid group
was related to the genetic distance between the parental lines. The majority of hybrids also
showed superiority over the standard check varieties. In general, hybrids from locally adapted
genotypes were superior in grain yield, plant height and grain weight compared to the high
parents and introduced hybrids indicating the potential for hybrids to increase productivitywhile
addressing farmers' required traits.
| Item Type: |
Article
|
| Uncontrolled Keywords: |
Farmers preferred traits, High parent heterosis,
Locally adapted genotypes,
Sorghum hybrids |
| Author Affiliation: |
aThe University of Queensland, Queensland, Alliance for Agriculture and Food Innovation, Hermitage Research Facility, 604 Yangan Rd,
Warwick, QLD, 4370, Australia |
| Subjects: |
Crop Improvement |
| Divisions: |
Sorghum |
| Depositing User: |
Mr T L Gautham
|
| Date Deposited: |
16 Nov 2017 03:37 |
| Last Modified: |
16 Nov 2017 03:37 |
| URI: |
http://eprints.icrisat.ac.in/id/eprint/15170 |
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