DEVELOPING RICE VARIETIES WITH ENHANCED ADAPTATION TO COLD PRONE RICE GROWING AREAS UNDER LOWLAND RAIN FED CONDITIONS OF ETHIOPIA

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Published: 2021-07-08

Page: 617-629


TADDESSE LAKEW *

Ethiopian Institute of Agricultural Research, Fogera Rice Research and Training Center, Woreta, Ethiopia.

ABEBAW DESSIE

Ethiopian Institute of Agricultural Research, Fogera Rice Research and Training Center, Woreta, Ethiopia.

ASAYE BERIE

Ethiopian Institute of Agricultural Research, Fogera Rice Research and Training Center, Woreta, Ethiopia

BETELEHEM ASRAT

Ethiopian Institute of Agricultural Research, Fogera Rice Research and Training Center, Woreta, Ethiopia.

DEJENE KEBEDE

Ethiopian Institute of Agricultural Research, Jimma Agricultural Research Centre, Jimma, Ethiopia.

HAILEMARIAM SOLOMON

Ethiopian Institute of Agricultural Research, Melkassa Agricultural Research Centre, Melkassa, Ethiopia.

*Author to whom correspondence should be addressed.


Abstract

Sixteen lowland rice genotypes were arranged in a randomized complete block design of four replications and assessed for cold tolerance, performance and yield stability. Analysis of variance revealed highly significant effects of genotype and environment for all traits studied while the interaction effect was significant for six of eleven traits. The AMMI analysis in grain yield showed that genotype, environment and their interaction were highly significant and the environment explained the highest variation, followed by the interaction. The first two multiplicative interaction principal component axes were highly significant and explained 83.8% of the interaction sum of squares. Spikelete fertility ranged from 89.9% (G1) to 97.8% (G9 and G11). Genotypes G4, G9, G11, G10, G12, G13 and G14 exhibited nearly complete panicle exesertion and high spikelet fertility indicating their tolerance to cold stress. AMMI 1 and GGE ranking biplots identified G4, G9, G11 and G12 as high yielding genotypes. While G9 was the best genotype in terms of mean yield, G4 was both high yielding and most stable genotype. Thus, genotypes that combine cold tolerance, high yield, and farmers’ preference (G4, G9 and G11) were verified and consequently, G9 and G11 were recommended for release in Fogera and similar areas.

Keywords: Rice genotype, cold tolerance, AMMI biplots, GGE biplots, grain yield.


How to Cite

LAKEW, T., DESSIE, A., BERIE, A., ASRAT, B., KEBEDE, D., & SOLOMON, H. (2021). DEVELOPING RICE VARIETIES WITH ENHANCED ADAPTATION TO COLD PRONE RICE GROWING AREAS UNDER LOWLAND RAIN FED CONDITIONS OF ETHIOPIA. Asian Journal of Advances in Research, 4(1), 617–629. Retrieved from https://mbimph.com/index.php/AJOAIR/article/view/2271

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