Dissecting the Relationship between Root Morphological Traits and Yield Attributes in Diverse Rice Cultivars under Subtropical Condition

Abstract

Understanding the link between root morphological traits and yields is crucial for improving crop management. To evaluate this link, a pot experiment was conducted in the net house of the Department of Agronomy, Bangladesh Agricultural University, Mymensingh, Bangladesh during the boro(dry season irrigated) rice growing season of 2019–20. Thirteen cultivars, named BRRI dhan29, BRRI dhan58, BRRI dhan67, BRRI dhan74, BRRI dhan81, Binadhan-8, Binadhan-10, Hira-2, Tej gold, SL8H, Jagliboro, Rata boro, and Lakhai, were used following a completely randomized design (CRD) with three replications. The cultivars were screened for root number (RN), root length (RL), root volume (RV), root porosity (RP), leaf area index (LAI), total dry matter (TDM), and grain yield (GY). A considerable variation in root traits, LAI, and TDM were found among the studied cultivars, and the highest GY (26.26 g pot−1)was found for Binahan-10. Thirteen cultivars were grouped into three clusters using hierarchical cluster analysis, where clusters 1, 2, and 3 assembled with 3, 5, and 5 cultivars, respectively. Considering all of the studied traits, Cluster 3 (Binadhan-10, Hira-2, BRRI dhan29, BRRI dhan58, and Tejgold) showed promise, followed by Cluster 2 (BRRI dhan81, BRRI dhan67, SL8H, BRRI dhan74, and Binadhan-8). Principal component analysis (PCA) revealed that the RV, RDW, RFW, TDM, and GY are effective traits for rice cultivation.

Optimum Nitrogen Application Acclimatizes Root Morpho-Physiological Traits and Yield Potential in Rice under Subtropical Conditions

“…Similarly, the RL, RN, RV, PL, and TGW were significantly and positively correlated with the GY in their studied cultivars [77]. Moreover, the results showed that the enhancement of rice yields involved superior root properties [78]. Finally, it can be concluded that in the agricultural production sector, the variety-specific fertilizer demands must be considered when setting fertilization dosages, enabling for the feasibility of maximizing rice yields by controlling the rice root growth with adequate N management.…”

Variations in Root Morphology and Yield among Rice Varieties in Response to Potassium under Subtropical Conditions

“…The main organ for nutrient intake in plants is the root. There were significant differences in root morphological traits among rice cultivars and a positive association between root traits and yield [5]. Additionally, upland paddy's root systems account for approximately 22% of the plant's dry mass production and are primarily organized at the upper 20 to 40 cm soil depth; however, these characteristics may fluctuate depending on the soil's chemical characteristics [6].…”