Water deficit on the physiological, morphoagronomic, and technological traits of carioca common bean genotypes

Abstract

Water deficit can alter the morphological, agronomic, physiological, and technological traits of the common bean plant, affecting bean grain yield. In addition to yield aspects, the grain post-harvest quality is a decisive factor for the adoption of a new cultivar.Thus, this study evaluated the effect of water deficit on the physiological, morphoagronomic, and technological traits of common bean. The experiment was carried out at in a greenhouse in a randomized block design with a 30 × 2 factorial arrangement, consisting of 30 carioca common bean genotypes and two water regimes (with and without water stress), with three replications.The water deficit affected most morphological, agronomic, and physiological traits; however, it was not significant on the darkening of the seed coat. Cultivars IAC 1849 Polaco, ANFc 5, ANFc 9, BRSMG Madrepérola, IAC Carioca Aruã, TAA Dama, and Branquinho exhibited high yield potential under water stress treatment as well as slow seed coat darkening during nine months of storage. The selection of bean genotypes with slow seed coat darkening could be performed at 30 days of storage.

Combining ability of common bean in a complete diallel cross under water deficit

“…The advanced lines Gen TS 3-3 and Gen TS 4-8 were developed for tolerance to water deficit, proving to be efficient in experiments with exposure to water deficit under natural growing conditions and in a greenhouse using pots with soil moisture sensors when evaluated per se (Gonçalves et al 2015, Ribeiro et al 2019, Ribeiro et al 2021, Gonçalves et al 2022. However, when they were used as parents in these combinations, they had low values of GCA and SCA for the traits of interest, possibly due to restricted genetic variability when they are combined with the other parents.…”