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Evaluation of Cold Tolerance in NERICA s Compared with Japanese Standard Rice Varieties at the Reproductive Stage
Abstract New Rice for Africa ( NERICA ) is a general name for interspecific rice varieties derived from a cross between the high‐yielding Asian rice ( Oryza sativa L.) between locally adapted African rice ( Oryza glaberrima Steud.). Eight NERICA s were evaluated for cold tolerance ( CT ) at the repr...
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| Published in: | Journal of agronomy and crop science (1986) 2015-12, Vol.201 (6), p.461-472 |
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| Main Authors: | , , , , , , , , , , , , , , , , |
| Format: | Article |
| Language: | English |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
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| Summary: | Abstract
New Rice for Africa (
NERICA
) is a general name for interspecific rice varieties derived from a cross between the high‐yielding Asian rice (
Oryza sativa
L.) between locally adapted African rice (
Oryza glaberrima
Steud.). Eight
NERICA
s were evaluated for cold tolerance (
CT
) at the reproductive stage and compared with their
O. sativa
parents and three Japanese standard rice varieties over 3 years. Cold tolerance was evaluated based on the filled grain ratio (
FGR
) after cold water irrigation. The
FGR
was greatly reduced by cold water irrigation.
NERICA
1, 2 and 7 had higher
FGR
(51.9–57.9 %), while
NERICA
6, 15 and 16 had lower
FGR
(6.2–14.5 %).
NERICA
1, 2 and 7 were less affected by cold stress, with a 31 % mean reduction in
FGR
, while
NERICA
6, 15 and 16 were greatly affected, with their
FGR
s being reduced by more than 80 %.
NERICA
3 and 4 were moderately affected by cold stress, with about 45 % reduction rate in
FGR
.
FGR
significantly influenced the grain weights of the varieties with strong positive correlations (r
= 0.83–0.91; P |
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| ISSN: | 0931-2250 1439-037X |
| DOI: | 10.1111/jac.12125 |