Cold tolerance evaluation in Chilean rice genotypes at the germination stage
| Autor: | Gabriel Donoso Ñanculao, Viviana Becerra Velásquez, Oscar Arbiza de los Santos, Mario Paredes Cárcamo |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
lcsh:GE1-350
Germplasm Oryza sativa Breeding program Biplot Abiotic stress lcsh:S food and beverages Biology coleoptile length lcsh:Agriculture Coleoptile Agronomy Germination Genotype Low temperatures Animal Science and Zoology experimental lines Agronomy and Crop Science lcsh:Environmental sciences |
| Zdroj: | Chilean journal of agricultural research v.73 n.1 2013 SciELO Chile CONICYT Chile instacron:CONICYT Chilean Journal of Agricultural Research, Vol 73, Iss 1, Pp 3-8 (2013) Chilean journal of agricultural research, Volume: 73, Issue: 1, Pages: 3-8, Published: MAR 2013 |
| Popis: | Low temperature is the most important abiotic stress affecting rice (Oryza sativa L.) yield in Chile. Rice in Chile is usually planted when the minimum air temperatures are below 12 °C. This temperature is lower than the optimum needed for normal rice germination. Therefore, the aim of this study was to evaluate cold tolerance in 20 experimental lines from the Rice Breeding Program of the Instituto de Investigaciones Agropecuarias (INIA), Chile, at the germination stage. Coleoptile length reduction (CRED), coleoptile length after cold treatment (CLEN), coleoptile length recovery (CREC), and coleoptile regrowth (CREG) were evaluated at 13 °C for 4 d using ’Diamante-INIA’ as the cold-tolerant control. To find genotypes with cold tolerance (low CRED value and high CLEN, CREC, and CREG values), genotypes were ranked, a biplot of principal components, and cluster analysis were performed. No differences were found among genotypes in the ranking based on CREC value so this trait was not considered. Analysis showed that only three experimental lines had cold tolerance similar to that of ’Diamante-INIA’; all other experimental lines exhibited intermediate to low cold tolerance. These results showed low cold tolerance of some Chilean genotypes at the germination stage, thus confirming the need to evaluate the rest of the germplasm from the Rice Breeding Program. |
| Databáze: | OpenAIRE |
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