نوع مقاله : مقاله پژوهشی
نویسندگان
سازمان تحقیقات، آموزش و ترویج کشاورزی، موسسه تحقیقات برنج کشور، رشت، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Rice is one of the most important cereals in the world and serves as a staple food for a large portion of the global population. Therefore, identifying and utilizing genetic diversity among genotypes is crucial for improving yield and grain quality. The present study evaluated the genetic diversity of 144 backcross inbred lines (BILs) derived from a cross between the Hashemi variety and the IR67418-110-32222 line, focusing on morphological and yield-related traits associated with the breeding objective. The experiment was conducted using a randomized complete block design (RCBD) with three replications, and ten morphological and yield traits were measured. The results revealed that the population possessed considerable genetic diversity, and all traits exhibited significant genetic differences (P < 0.01). Grain yield ranged from 1.43 to 6.42 t ha⁻¹, with an average of 4.45 t ha⁻¹. The four identified principal components explained 76.97% of the total trait variance, and cluster analysis divided the genotypes into two distinct groups. Genotypes with longer panicles, a higher number of filled grains per panicle, and larger flag leaf areas exhibited higher grain yields. Overall, the findings demonstrated that multivariate analyses are effective tools for identifying genotypes with desirable combinations of target traits and selecting suitable parents for breeding programs. The studied population can serve as a valuable genetic resource for developing high-yielding rice cultivars with desirable grain quality.
کلیدواژهها [English]
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