ACCURACY OF GENETIC PARAMETERS ESTIMATION AND PREDICTION OF GENOTYPIC VALUES IN EUCALYPTUS USING DIFFERENT PLOT TYPES

IF 0.7 4区农林科学 Q3 FORESTRY

Cerne Pub Date : 2020-12-01 DOI:10.1590/01047760202026042710

M. R. Amâncio, Mateus Chagas Andrade, J. Paludeto, Matheus Perek, Odair Bison, Amanda Roberta Vergani, A. N. Dias, E. Tambarussi

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引用次数: 1

Abstract

A suitable experimental design should control the environmental effect and be capable of discriminating genotypes. Two clonal tests of Eucalyptus were planted side by side in a randomized block design with the same 32 treatments under two different plot designs. The first trial was designed with five plants per plot (linear plot, LP) and six block replicates at a spacing of 3 x 2 m. The second trial was designed with one plant per plot (single-tree plot, STP) and 30 block replicates also at a spacing of 3 x 2 m. Diameter at breast height ( dbh ), height ( h ), and individual volume ( The STP broad-sense heritabilities values of for and , for the LP design (0.12 for h and for The between the standard and the estimated genotypic variance (  g S ) was lower for the three evaluated traits in the STP trial. The correlations between the genetic values positive and of high magnitude, ranging from 0.87 ( h ) to 0.91 ( vol but there were many differences between the two designs with regard to the ranking of clones. The STP presented better discriminant power according to the biplot analysis, as well as more accurate and reliable

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不同小区类型桉树遗传参数估计和基因型值预测的准确性

适当的实验设计应能控制环境效应，并能区分基因型。采用随机区组设计，在2个不同样地设计下，采用相同的32个处理，并排种植2个桉树无性系试验。第一次试验设计为每亩5株(线性小区，LP)， 6个块重复，间距为3 × 2 m。第二次试验设计为每个地块一株植物(单树地块，STP)， 30个块重复，间距为3 x 2 m。在STP试验中，三个被评估性状的STP广义遗传力值(h和h)与估计基因型方差(g S)之间的差值较低。遗传值在0.87 (h) ~ 0.91 (vol)之间呈显著正相关，但两种设计在无性系排序上存在较大差异。双图分析表明，STP具有较好的判别能力，具有较高的准确性和可靠性

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来源期刊

Cerne 农林科学-林学

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Cerne is a journal edited by the Federal University of Lavras, Minas Gerais state, Brazil, which quarterly publishes original articles that represent relevant contribution to Forestry Science development (Forest ecology, Forest Management, Silviculture, Technology of Forest Products).