Variação e número mínimo de amostras para o caráter dias após a polinização em germoplasma de tucumanzeiro.

Abstract

The objective of this work was to evaluate the days after pollination (DAP) character in fiber palms from the Active Germplasm Bank - BAG of Embrapa Amazon Eastern, in order to evaluate the number of days required from pollination to maturity, as well as to estimate the minimum number of evaluations. For this purpose, 148 plants representing 32 accessions were evaluates. In each plant a newly fertilized inflorescence was marked and followed until fruit maturation. The repeatability was estimated based on two, four and six inflorescences followed in 96, 45 and nine plants, respectively. The data obtained were submitters to basic statistical analyses and estimates of the repeatability coefficients (r) by means of four methods: analysis of variance (ANOVA); principal components based on the covariance matrix (CPCV) and correlations (CPC); and structural analysis based on the correlation matrix (AEC) and covariance matrix (AECV). The fiber palms showed a low coefficient of variation (CV=9.63%) for the character days after pollination. In the followed inflorescences, the fruits were mature, on average, 249.2 days after fertilization. The values of the repeatability and determination coefficients had low magnitudes. The highest values were detected in the sample with four inflorescences by the principal components method based on the covariance matrix (PCVC), with r=0.321 and R2=65.9%, suggesting that to obtain the real value of the individuals a number of approximately nine inflorescences will be necessary with 80% reliability. Therefore, it was possible to observe that the fiber palms from this BAG have considerable variation for the character days after pollination (DAP), with two late and two early accessions for fruit maturation and indicating nine inflorescences as the minimum number of samples.