Barley breeding for quality improvement in Tunisia

Abstract

This study was initiated to assess the effectiveness of three selection procedures applied in the early segregating generations of barley crosses for quality traits. The selection procedures were pedigree selection (PS), bulk selection (BS) and single seed descent selection (SSD). Selection was operated in F 2 's crosses. Field trials were conducted with 19 F 3 crosses of barley in two different environments, a sub-humid environment at Beja and a semi-arid one at Kef. Heading date (HD), thousand kernel weight (TKW), protein content (PC), β-glucan content (BG) and husk percentage (HP) were evaluated. Data were subjected to an additive main effects and multiplicative interaction (AMMI) model to determine the efficiency of each method of selection for the proper environment. The results show that the AMMI model generated predictive optimizing selection method. The pedigree selection was more efficient in high input environment, while the bulk method was very effective for the selection of kernel weight in target environment.

Adaptation of oat genotypes in organic and conventionally managed fields in the northwestern Himalayas

“…Accordingly, with respect to PHmat, genotypes G12, G2, and G50 occurred in two or more environments, while the remaining genotypes showed specific adaptation. In barley breeding trials, Medimagh et al (2012) reported that based on the top four AMMI selections under different breeding methods, it was found that the pedigree method for high-input environments was the best method to screen for high yield potential. In sorghum yield trials, Hailemariam and Tesfaye ( 2019) found both wide and specific adaptations for seed yield.…”

Assessment of Genetic Diversity and Population Structure of Tunisian Barley Accessions (Hordeum vulgare L.) Using SSR Markers

“…In less developed Mediterranean countries such as Tunisia, barley plays a key role as its grain and straws are the principal feed for livestock. Small ruminants such as sheep and goats are the main livestock in Tunisia, representing a valuable dietary contribution in rural areas and a principal economic output (Medimagh et al, 2012). Genetic improvement to increase yield is underway in the Tunisian breeding program.…”