The present study, comprising an evaluation of cotton amphidiploid hybrids and their families for yield and fiber quality traits, commenced from 2007 to 2022 at the Chirchik State Pedagogical University, Tashkent, Uzbekistan. The amphidiploid hybrids’ creation was through interspecific hybridization of Gossypium hirsutum subsp. euhirsutum cultivar Kelajak × F1 (G. arboreum subsp. perenne × G. arboreum subsp. obtusifolium var. indicum) and experimental polyploidy, with genetically enriched new genotypes obtained. According to genetic variability, a considerable variation showed based on F1–F6 populations belonging to various clusters for the traits boll weight (2.3–6.21 g), 1000-seed weight (67.3–125.529 g), fiber length (24.9–34.4125 mm), fiber yield (31.4%–40.26%), and fiber index (6.3–7.5875 g). Furthermore, among the F6 G. hirsutum subsp. euhirsutum cultivar Kelajak × F1 (G. arboreum subsp. perenne × G. arboreum subsp. obtusifolium var. indicum) combination families, the promising genotypes selected gave the highest trait values for boll weight (6.6 ± 0.13 g – Family- 41), 1000-seed weight (125.8 ± 3.48 g – Family-59), fiber yield (40.3% ± 0.65% – Family-59), fiber index (8.5 ± 0.23 g – Family-59), and fiber length (34.5 ± 0.16 mm – Family-8). Genotype evaluation using cluster analysis allows the prediction of cotton families with a better combination of traits. Introgressive hybrids created based on the early maturing families, viz., Family-5, Family-8, Family- 13, Family-14, Family-41, and Family-59, with high yields and fiber indices attained inclusion in the Cotton Gene Pool, Uzbekistan (Certificate of the Academy of Sciences of the Republic of Uzbekistan No. 4/1255-2635 dated November 26, 2020). The promising families selected based on their best performance included F5 (G. hirsutum L. × F1 [G. arboreum L. × G. arboreum L.], Family-5, Family-8, Family-13, Family-14, and Family-59) and F6 (G. hirsutum L. × F1 [G. arboreum L. × G. arboreum L.], Family-5, Family-13, and Family-59), with the said cotton gene pool as valuable recombinants benefiting future breeding programs.

Wheat genotypes grown in Uzbekistan and other Central Asian countries cannot compete with commercial cultivars for productivity. These landraces are valuable genetic resources that could benefit in developing new cultivars enriched with nutritious microelements and other ingredients beneficial for human health. As a result of wheat research, for the first time, preserving the 31 landraces in their natural form in the remote territories of Uzbekistan ensued, including a catalog of compilation by determining their economic and morphologically valuable features. Based on cluster analysis and quantitative characteristics, local wheat genotypes attained five groupings with a compiled dendrogram. With the dendrogram, determining the morphological attributes of ancient local cultivars of wheat materialized, even though the grain color is the same, a sharp difference is noticeable, but still similar based on quantitative characteristics that ensure the grain yield. In ancient local wheat cultivars, plant height and 1000-seed weight have a weak correlation with other traits, and a strong positive association was distinct between the spike length and spikelets per spike and the number and grain weight per spike. The polymorphism of soft wheat landraces showed according to the electrophoretic spectra in the grain’s gliadin proteins. The electrophoretic parameters of gliadin proteins indicated that of the six samples of cultivar Kzyl-bugdoy listed in the catalog, only four have similar electrophoretic spectra. In cultivar Ak-bugdoy’s four specimens, three have identical spectra, while three from the cultivar Surkhak have different bands. Based on individual selection and according to electrophoretic spectra from wheat landraces, the release of the wheat cultivar Kairaktash was due to its high baking and nutritional value.