Root growth and productivity of conventional and herbicide-tolerant canola in contrasting environments

Abstract

The canola (Brassica napus L. oil variant) is considered as a winter crop alternative in south Brazil. Thus, the aim of this study was to compare the root growth and the productivity components of hybrid grains of conventional and herbicide tolerant canola in different localities. The experiments were conducted in the municipality of Passo Fundo, Rio Grande do Sul state and Guarapuava, Paraná state, Brazil. The randomized block design with four replication was used. The genotypes evaluated were: Hyola 61 and H92002 (conventional), Hyola 571 CL and K10050 (imidazolinone-resistant), and Hyola 751 TT (triazine-resistant). In order to evaluate the root system, soil monolith were collected and image analysis measuring the superficial area and the total root volume of the sample in diameter classes, root density and specific surface area were done. The grains productivity components and the number of branches in the plant were measured through the number of siliques in the branches. The productivity of the grains and the thousand grain mass were measured as well. The canola hybrid presented higher root length, surface area and volume in the diameter scale between 1 and 5 mm of density. In addition, there were variations in the growth of roots and grain productivity in different environments, in which imidazolinone-tolerant hybrids presented higher development of the roots, as well as, higher grain productivity in the different environment studied.

A computational method to assist evaluation of root length of soybean based on digital image processing

“…The determination coefficient between the reference method and each software was calculated resulting in R² = 0.514 and 0.453, using ImageJ and Safira, respectively. Mattioni et al (2017) also used Safira to evaluate the canola root system (Brassica napus L.), comparing the root growth and the productivity components of hybrid grains of conventional and herbicide tolerant canola in different localities. The cost of software licenses for root image processing may be high for researchers developing studies on plant root systems.…”