Applicability of Chlorophyll Meter Readings as Yield Predictor in Durum Wheat

Abstract

2 Chlorophyll meter (SPAD) readings can play an important role in selecting promising lines for wheat breeding. Twenty five durum wheat (Triticum turgidum L. var. durum) genotypes were grown under irrigated and rainfed conditions at two locations in Diyarbakir, Turkey during 2005 and2006. The aim of this study was to evaluate the genetic variation in SPAD readings, and to determine relationships among SPAD readings, grain yield, grain quality and yield parameters. SPAD readings were taken at heading and grain middle milky stages. SPAD readings exhibited greater genotypic variance compared with grain yield and protein content. Genotype by environment interaction variance did not associate with SPAD readings and, grain yield. At both measuring stages there were positive correlations between SPAD and grain yield. Correlation analysis revealed that grain yield under both rainfed and irrigated conditions was mostly determined by grain number. These results suggest that SPAD readings can be used as selection criteria to select durum wheat genotypes that are high yielding but without any decrease in grain protein content.

Multiple Leaf Measurements Improve Effectiveness of Chlorophyll Meter for Durum Wheat Nitrogen Management

“…Given the differences in leaf chlorophyll concentration and blade thickness between bread wheat and durum wheat, SPAD readings vary among bread wheat and durum wheat cultivars (Debaeke et al, 2006). In addition, almost all SPAD meter studies in durum wheat have been conducted under rain-fed Mediterranean environments (Debaeke et al, 2006;Bail et al, 2005;Lopez-Bellido et al, 2004;Yildirim et al, 2010). There are no reports on the use of SPAD meters to guide N applications, predict grain yield, and evaluate grain protein content in durum wheat in the arid conditions of the southwestern United States.…”

Influence of Probable Precipitation Futures on Strawberries (Fragaria x ananassa): Results from a Simulated Rainfall Experiment

“…Estimation of leaf chlorophyll concentration allows researchers to estimate not only plants' photosynthetic capacity, but also the effects of disease, nutritional, or environmental stress [24,25]. Though chlorophyll content has been positively associated with yield in some crops [26], it is estimated that, under periods of water stress, photosynthetic activity decreases [27], likely leading to decreased yield and crop quality.…”

Evaluation of exotic wheat (Triticum aestivum L.) genotypes for heat tolerance on the basis of physiological phenotyping

“…viz. membrane thermostability (Sharma et al, 2016;Yildirim et al, 2009;Reynolds et al, 1994), canopy temperature depression (Bahar et al, 2008;Reynolds et al, 1994Reynolds et al, , 2001, chlorophyll content (Yildirim et al 2011), stomatal conductance (Reynolds et al 1994), grain number per spike, grains per spikelet and thousand grain weight and grain yield (Pimentel et al, 2015). The main objective of this study was to evaluate some exotic wheat genotypes to identify heat tolerant genotypes for using in future breeding program and to prepare a ranking table on the basis of physiological traits to identify the best genotype.…”