Association between grain yield, grain quality and morpho-physiological traits along ten cycles of recurrent selection in bread wheat (Triticum aestivum L.)

Abstract

The objective of the present investigation was to examine the relationships between agronomical behavior and grain quality along ten cycles of a recurrent selection program performed under rainfed condition. Twenty-four lines, four for each one of the 0, 2, 4, 6, 8 and 10 cycles of recurrent selection, were evaluated for two consecutive years (2011 and 2012). The experimental lines were evaluated under conventional (CT) and no tillage (NT) systems. Grain yield and grain weight were determined and harvest index and grain number estimated. Flour protein content, sodium dodecyl sulphate sedimentation (IS-SDS) and lactic acid SRC (LASRC) were considered as end-use quality predictive tests. The Spearman correlation coefficient was used to measure the relationships among yield, its components and grain quality parameters. Within the context of CT, flour protein content was negatively associated with all the agronomic variables. The IS-SDS has a negative association with the grain weight; meanwhile, LASRC associated positively with all the agronomic variables. When wheat was grown in NT, the relationship between IS-SDS and harvest index, like LASRC with all agronomic traits, was positive. Confining the discussion to the CT results, after ten cycles of recurrent selection the highest grain yield achieved was accompanied by a decrease in protein percentage. However, the decrease in the percentage of protein in more advanced selection cycles was offset by an improvement of its quality.

Stem Reserve Mobilization in Relation to Yield under Different Drought and High Temperature Stress Conditions in Wheat (Triticum aestivum L.) Genotypes

“…Dwivedi et al, (2017) also reported higher reduction in grain yield (60.3%). Maich et al, (2017) reported elevated temperature caused a reduction in grain yield between 6-21% as compared normal grown varieties. Aynehband et al, (2011) andWang et al, (2017) reported that grain weight depends on different dates of sowing and water availability.…”

Multipopulation recurrent selection: An approach with generation and population effects in selection of self‐pollinated progenies

“…Most self‐pollinated crops, such as common bean ( Phaseolus vulgaris L.), have limitations in crossing systems and in obtaining populations from crosses of several parents at once (Fouilloux & Bannerot, 1988; Sorrels & Fritz, 1982). Instead, breeders carry out several populations by pairwise intercrossing of many parents, achieving relevant success along recurrent selection cycles (Maich, Steffolani, Di Rienzo, & León, 2017; Morais Júnior et al., 2017; Posadas, Eskridge, Specht, & Graef, 2014; Ramalho, Abreu, & Santos, 2005). We refer to this method of recurrent selection as multipopulation recurrent selection (MRS).…”

An Analysis of the Genetic Diversity of Bread Wheat x Spelt Breeding Lines in Terms of Their Resistance to Powdery Mildew and Leaf Rust

“…Biodiversity conservation in crops, in particular wheat, is one of the greatest challenges facing cereal breeders in the 21st century [1]. Modern bread wheat (Triticum aestivum L.) varieties have to be characterized by high yields, high protein content, as well as high resistance to biotic and abiotic stressors [2].…”