Abstract
Wheat breeding plays a pivotal role in ensuring food security, as wheat ranks among the most demanded and widely cultivated cereal crops globally. This article presents a comprehensive analysis of a collection of wheat breeding lines, utilizing agronomic, phytopathological parameters, and molecular-genetic screening. The main traits are described in detail, including days to heading (ranging from 21 to 221 days, predominantly mid-season lines), plant height (92–134 cm), and NDVI biomass index (51–72.5), with emphasis on promising lines exhibiting high NDVI values (>70). Evaluation for yellow rust resistance identified seven immune and five moderately susceptible lines; approximately 60% of the genotypes displayed immunity to the causal agent of Pyrenophora tritici-repentis. Resistance levels were classified according to the area under the disease progress curve (AUDPC): resistant (AUDPC <200), moderately resistant (200–400), and susceptible (>400) groups. Molecular screening revealed the presence of the recessive tsn1 allele, associated with resistance to PtrToxA, in 18 lines (52.94%). Correlation analysis indicated mostly weak associations between agronomic traits and disease resistance, except for expected strong positive correlations among parameters related to a single disease. Statistical analysis demonstrated considerable variability and the presence of outliers in most traits, underscoring the necessity for robust analytical methods. The findings highlight the effectiveness of integrating conventional and modern assessment approaches for selecting promising wheat lines in breeding programs.
01 Introduction
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02 References
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