Tolerancia a sequía y rendimiento de grano de híbridos de sorgo
DOI:
https://doi.org/10.59741/agri.v3i1.14Keywords:
Sorghum bicolor; Stress; Selection indexesAbstract
In the State of Tamaulipas, Mexico, sorghum [Sorghum bicolor (L.) Moench] is planted annually on 1.0 million hectares, mainly under rainfed conditions with low yields due to drought. To identify sorghum hybrids with high grain yield under two soil moisture conditions, a trial with 34 sorghum hybrids was established at the INIFAP-Rio Bravo Tamaulipas Experimental Station, during the 2021/2022 autumn-winter cycle. Two edaphic moisture conditions were compared: Irrigation and simulated rainfed (pre-planting irrigation). The experimental design was a randomized complete block with three replications, in split plot; the large plot for soil moisture conditions and the subplot for hybrids. Grain yield was used to calculate: Drought susceptibility index (S), yield differential (Dif Rend), arithmetic mean (Media arit), geometric mean (Media geom) and relative efficiency index (IER). The analysis of variance revealed a significant effect between edaphic moisture conditions (21.27 % less grain yield in simulated rainfed) and a significant effect between hybrids. Hybrids with adaptation to simulated rainfed (RB248A*RB133 and RB-3030) and hybrids with high performance in both edaphic humidity conditions (RB248A*RB133 and SBA25*RB256), were identified.
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