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CAC-PGMP PROGRAMA DE PÓS-GRADUAÇÃO STRICTO SENSU EM GENÉTICA E MELHORAMENTO DE PLANTAS - MULTICAMPUS UNIVERSIDADE DO ESTADO DE MATO GROSSO "CARLOS ALBERTO REYES MALDONADO" Phone: No available http://portal.unemat.br/pgmp

Banca de DEFESA: VERA LÚCIA SIMÕES ANDRE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : VERA LÚCIA SIMÕES ANDRE
DATA : 02/02/2021
HORA: 13:00
LOCAL: Teleconferência
TÍTULO:

AGRONOMIC PERFORMANCE AND PRODUCTIVITY STABILITY OF BIOMASS SORGHUM GENOTYPES CULTIVATED IN THE STATE OF MATO GROSSO

PALAVRAS-CHAVES:

Sorghum bicolor; plant breeding; renewable energy; biofuel; GxA interaction.

PÁGINAS: 35
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
ESPECIALIDADE: Melhoramento Vegetal
RESUMO:

Biomass sorghum has emerged as a crop with high biomass production that can be used for both energy generation and animal feed. However, for the success of a crop, one of the main factors is the use of productive and stable genotypes in the growing region. The present research aiming to provide farmers in the State of Mato Groso with a new alternative for local agribusiness, evaluated the agronomic performance and productive stability of sorghum biomass genotypes through field experiments developed in three different locations in the state. The main objective of the research was to identify cultivars adapted to cultivation in the State of Mato Grosso, which could be recommended for use by farmers. For this purpose, 25 sorghum genotypes were evaluated in the 2019/20 harvest in the municipalities of Cáceres, Nova Xavantina and Sinop. Of the 25 genotypes, four are commercial hybrids, two of which are silageiro (BRS 658 and Volumax) and two are biomass (BRS 716 and AGRI002-E) and the other 21 genotypes are of the biomass type, but experimental genotypes, developed by Embrapa Corn and Sorghum. Average plant height (ALT), green mass production (PMV), dry mass production (PMS) and flowering (FLOWER) were evaluated and the data were subjected to joint analysis of variances of the environments and, subsequently, depending on the means for the different characteristics, the genotypes were grouped by the method proposed by Scott-Knott (P <0.05). For PMV, PMS and ALT, characteristics that demonstrated significance of the genotype x environment (GxA) interaction, the genotype stabilities were evaluated by the method of Wricke (1965). As for flowering, forage hybrids were earlier than biomasses, with BRS 658 blooming, on average at 68 days, and Volumax blooming at 76 days in Cáceres and 72 days in Sinop. The biomasses varied between 115 to 134 days to flower in Sinop and between 127 and 158 days in Cáceres. BRS 658 and Volumax equalized in terms of heights, PMV and PMS, with averages of 2.8 m and 36 t.ha-1 and 13 t.ha-1, respectively. With later flowering and longer cycles, sorghum biomass showed superiority to silagers in terms of plant size, PMV and PMS, with variability among them and the possibility of selecting the most productive and stable ones. In this regard, among commercial cultivars, despite similar plant heights, around 5 m, the hybrid BRS 716 was superior in productivity of green and dry mass to the giant Bolivian sorghum AGRI002-E in Cáceres environments (PMV = 89 t. ha-1 x 59 t.ha-1; PMS = 39 x 29 t.ha-1) and Nova Xavantina (PMV = 97 t.ha-1 x 73 t.ha-1; PMS = 31 t.ha-1 x 26 t.ha-1), similar in Sinop, with averages around 85 t ha-1 for PMV and 35 t ha-1 for PMS. Despite the significant GXA interaction for PMV and PMS, experimental hybrids 2 (201934B002) and 9 (201934B009) stood out, surpassing the commercial ones in stability being the most suitable for cultivation in the evaluated environments, whether for energy production or animal feed, since demonstrated high average yields of green matter (PMV = 95 t ha-1) and dry matter (PMS = 38 t ha-1), in addition to high phenotypic stability for these characteristics in different cultivation sites.

MEMBROS DA BANCA:
Interno - 985.174.497-20 - FLAVIO DESSAUNE TARDIN - UENF
Interno - 129897002 - ISANE VERA KARSBURG
Externo à Instituição - RAFAEL AUGUSTO DA COSTA PARRELLA - EMBRAPA

Notícia cadastrada em: 20/01/2021 05:18