A set of 100 IRRI bred advanced breeding lines were tested at Gazipur
(as moderate productive control site) and at Habiganj (as high
productive site) following row-column design with 2 replications. The
breeding lines were highly variable in days to maturity and plant height
but not in grain yield. However the interaction effects between
genotype and environment (GXE) were significant for all three traits. At
Gazipur, the breeding lines yielded with range between 3.3 to 7.3 t/ha
with a growth duration range of 138-154 days, while at Habiganj they
yielded 5.1-7.9 t/ha with growth duration of 139-159 days. The highest
yielding genotype was IR99092-B-B-78 followed by IR13A390,
IR99061-B-B-7, IR14D111, etc at Gazipur, while IR13A390 followed by
IR100008-91-B yielded the highest at Habiganj site. Based on yield and
growth duration, 22 breeding lines showing better performance at
Gazipur, 9 lines at Habiganj and 2 lines for both locations were
selected for further evaluation.
Rice is the major staple food for more than half of the world’s
population. The study therefore the breeding lines were highly variable
in days to maturity and plant height but not in grain yield. However the
interaction effects between genotype and environment (GXE) were
significant for all three traits.
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This study received no specific financial support.
The authors declare that they have no competing interests.
All authors contributed equally to the conception and design of the study.