Banca de DEFESA: LÍLLIAN KÉLLEN PEREIRA NUNES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LÍLLIAN KÉLLEN PEREIRA NUNES
DATE: 31/10/2025
TIME: 14:00
LOCAL: Garanhuns/PE- UFAPE
TITLE:

Growth indicators of forage cactus genotypes of the genera Opuntia and Nopalea of agronomic interest

KEY WORDS:

Genetic Improvement; Participatory Methods; Semi-Arid

PAGES: 60
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Pastagem e Forragicultura
SPECIALTY: Avaliação, Produção e Conservação de Forragens
SUMMARY:

With constant climate change, the use of adapted plants, such as forage cactus, is essential. Despite the large number of varieties, the most widespread varieties in the field are only Mexican Elephant Ear, Miúda, and IPA-Sertânia, making the crop vulnerable to pest and disease attacks and loss of genetic diversity. The use of participatory methodologies is an alternative to bringing producers closer to genetic improvement programs, considering their preferences and facilitating the acceptance of new cultivars. The objective of this study is to identify and evaluate traits of interest in forage cactus genotypes through participatory evaluations. Ten forage cactus clones (IPA-200016, IPA-200174, IPA-100661, IPA, 100662, IPA-200205, IPA-200149, IPA-100004, IPA-200206, IPA-200008, IPA-100664) that were implanted in the experimental farm of UFRPE in the city of Garanhuns - PE were evaluated. Six producers and 18 researchers and field technicians participated, who were divided into 2 groups (producers and researchers). The selection criterion was based on the availability to participate and having experience with the crop. Scores from 1 to 4 (1 - poor, 2 - fair, 3 - good, and 4 - excellent) were assigned to the following characteristics: stand uniformity, growth rate, growth habit, number of cladodes, cladode size, cladode color, phytosanitary aspects, presence and abundance of spines and glochidia, and regrowth capacity. Biometric evaluations were performed, evaluating plant height and width, and the number, length, and width of cladodes. The characteristic that obtained the lowest averages was phytosanitary aspects, with 1.43 assigned by the producers and 1.37 by the researchers, both for the small cultivar. In the presence and abundance of spines and glochidia, the cultivars classified with the highest averages by the producers were 3.14 F-08 and 3.0 OEA clone 6, while by the researchers they were 3.25 Orelha de Onça, 3.02 OEM, and OEA clone 6. The tallest and shortest plants, respectively, were IPA-Sertânia and Orelha de Onça. The widest plant was F-08 and the shortest was OEA clone 6. The plants with the highest average length of total cladodes were IPA-Sertânia and OEM. In terms of the number of total cladodes, the cultivar with the lowest performance was OEA clone 9. The responses given by the groups of researchers and producers were not very divergent, which can be considered an advantage, since the desirable and undesirable characteristics are viewed from the same perspective. Through participatory assessments, producers can determine what improvements they expect for forage palm crops, such as plants that are less susceptible to pests and diseases and have a higher incidence of cladodes, contributing to the success of genetic improvement programs.

COMMITTEE MEMBERS:
Presidente - 330722 - ALBERICIO PEREIRA DE ANDRADE
Interno - 1412816 - ANTÔNIO CLEMENTINO DOS SANTOS
Externo à Instituição - JOSÉ ROBERTO DE SÁ - UVA