Evaluation of methods for wheat grain hardness determination

• Published in: Plant, soil and environment Vol. 50; no. 11
• Main Authors: Famera, O.(Ceska Zemedelska Univ., Prague (Czech Republic). Agronomicka Fakulta)E-mail:famera@af.czu.cz, Hruskova, M.(Vysoka Skola Chemicko-technologicka, Prague (Czech Republic)), Novotna, D.(Odkolek (Czech Republic))
• Format: Journal Article
• Language: English
• Subjects: BLE; CALIDAD; CULTIVOS DE INVIERNO; CULTURE D'HIVER; ESPECTROSCOPIA INFRARROJA; EVALUACION; EVALUATION; FERMETE; FIRMEZA; FIRMNESS; GENETIC VARIATION; GRAINE; INFRARED SPECTROPHOTOMETRY; MEASUREMENT; MEDICION; MESURE; METHODE; METHODS; METODOS; QUALITE; QUALITY; SEEDS; SEMILLA; SEPARADORES; SEPARATEUR; SEPARATORS; SPECTROSCOPIE INFRAROUGE; TRIGO; TRITICUM AESTIVUM; VARIACION GENETICA; VARIATION GENETIQUE; VARIEDADES; VARIETE; VARIETIES; WHEATS; WINTER CROPS
• ISSN: 1214-1178

Grain hardness of winter wheat cultivars was evaluated during 1997-2001 using several methods as follows: wheat hardness index WHI (DO-Corder Brabender), 0.140 mm sieve threw ratio PPS (DO-Corder Brabender), grain hardness by NIR (Inframatic 8611 Perten), particle size index PSI (LM 3303 Perten). All tested methods showed varietal (genetic) origin of grain hardness trait. The lowest coefficient of variation (12.6%) was determined with the NIR method, whereas when using WHI and PSI methods, these coefficients were 32.8 and 30.6%, respectively. A significant influence of year-class was found only when PPS method was used. High correlations were found between the methods as follows: WHI x NIR (r=0.84), WHI x PPS (r=-0.79), and NIR x PPS (r=0.74). During 2000-2001, the correlation coefficient between PSI and NIR was -0.93. The coefficient of variation for PSI was 28.5%. All the methods tested may bu used for grain hardness determination, but the NIR method showed the lowest variability of obtained results.