Seedling selection of sorghum for drought tolerance based on root morphology.

Selection for drought tolerance is one of the main challenges of sorghum breeding programs, and early phenotyping, in the seedling phase, can increase selection gains for this trait. This work evaluated characteristics related to root morphology as indicators for early selection of tolerant genotypes to water restriction. Twenty-six hybrids were evaluated, of which twenty-three were experimental and three commercial (BRS310, DKB540 and 1G282). The hybrids were grown in tube-shaped containers in a greenhouse with non-stress stressed water. The evaluated characteristics were Root length (RL), root surface area (SA), root diameter (RD), root volume (RV), surface area of very thin roots (from 0-1 mm in diameter) (SA1), as well as the root/shoot dry mass ratio (R/S). Under water restriction, the hybrids with the best performances for most of the evaluated characteristics were BRS310, 1516057, 1719034, 1719026, 1716041, 1G282, 1516059, 1720052, 1716049, 1718036 and 1716045. The characteristics RV, SA, SA1 and R/S showed the greatest contribution in the selection of these hybrids.

Bibliographic Details

Main Authors:	PINTO, D. R., MENEZES, C. B. de, CARVALHO, A. J. de, PORTUGAL, A. F., MAGALHAES, P. C., SILVA, K. J. da, SANTOS, C. V., CAMPOS, A. F., OLIVEIRA, S. M. de, ASPIAZÚ, I.
Other Authors:	DEYVISSON RODRIGUES PINTO, Universidade Estadual de Montes Claros; CICERO BESERRA DE MENEZES, CNPMS; ABNER JOSÉ DE CARVALHO, Universidade Estadual de Montes Claros; ARLEY FIGUEIREDO PORTUGAL, CNPMS; PAULO CESAR MAGALHAES, CNPMS; KARLA JORGE DA SILVA, Bolsista; CRISLENE VIEIRA SANTOS, Bolsista; ALEXON FERNANDES CAMPOS, Bolsista; SIMONICA MARIA DE OLIVEIRA, Universidade Estadual de Montes Claros; IGNACIO ASPIAZÚ, Universidade Estadual de Montes Claros.
Format:	Artigo de periódico biblioteca
Language:	Ingles English
Published:	2023-07-19
Subjects:	Tolerância à seca, Seleção precoce, Sorghum Bicolor, Sorgo, Drought tolerance, Early selection,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1155037 https://doi.org/10.18512/rbms2023v22e1310
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