INITIAL VIGOR IN WHEAT GERMOPLASM (Triticum spp.)

• DOI: https://doi.org/10.22533/at.ed.973422408024

• Palavras-chave: Coleóptilo, área foliar, agricultura de conservación, riegos, altura.

• Keywords: Coleoptile, leaf area, conservation agriculture, irrigation, height.

• Abstract: The scarcity of water and the low profitability of wheat cultivation will force in the short term to use conservation tillage systems that include the retention of residues on the surface to promote optimal establishment and greater leaf development of the seedlings that increase competitive aptitude. against weeds and increase water use efficiency by avoiding losses through evaporation. Given this new panorama, the use of wheat genotypes (Triticum spp.) with characteristics of greater initial vigor that are more competitive when planted in soils with residues on the surface will help the adoption of this system. The objective of the present study was to determine the characteristics of initial vigor and its association with plant height in wheat genotypes. For this purpose, the length of the coleoptile and the leaf area of the first three leaves of 414 wheat genotypes were measured. The length of the coleoptile of the genotypes fluctuated between 3.9 and 11.3 cm, the most frequent class was between 7.1 and 9 cm in length with 206 genotypes. Durum wheats had longer coleoptiles than bread wheats. Plant height and average leaf area of the first three leaves were positively associated with coleoptile length.