Genetic analysis to improve rice (oryza sativa l) grain yield attributes and quality traits [electronic resource]

Includes bibliographic reference

The investigation was carried out in rice growing seasons of 2020, 2021 and 2022, comprising P1, P2, F1
and F2 for thee crosses Giza 179 × Suweon 361, Giza 177 × Milyang 349, Giza 177 × Sakha super 300 were used
to improve grain yield attributes and quality traits. Therefore, the highest grain yield plant-1 resulted with Sakha
Super 300 (50.80 g). While F1 of the crosses Giza 177 × Sakha super 300 and Giza 179 × Suweon 361 provided
the highest values 55.80 and 55.14 g, respectively, and F2 of the cross (Giza 177 × Sakha super 300) give 50.80 g.
The parent Sakha super 300 reported highest milling percentage value 73.06%. While, F1 of Giza 177 × Sakha
super 300 displayed the highest value 74.60%. However, F2 of cross (Giza 177 × Milyang349) was noted
maximum value 62.83%. The degree of dominance was greater than unity (±1.0) for all the studied traits for the
three crosses except panicle length, panicle weight, and fertility percentage for cross 1, panicle length, number of
tillers, grain length and head rice for cross 2, and 1000-grain weight, grain length and grain width for cross 3,
suggesting the important of over dominance in controlling traits. The first PCA (PC1) was 98.45% of the difference
and directionally positive associated with Suweon 361, F1 of cross (Giza 179 × Suweon 361), F1 of cross (Giza
177 × Milyang 349), P2 of cross (Sakha super 300) and F1 of cross (Giza 177 × Sakha super 300).
Keywords: grain yield, quality, PCA analysis, phenotypic correlation, prediction selection, rice

Summary in Arabic