Selection indexes and principal components for agronomic and bromatological traits in forage cactus

Author:

Jesus Mariana S. de1ORCID,Passos Adriana R.1ORCID,Diniz Rafael P.2ORCID

Affiliation:

1. Universidade Estadual de Feira de Santana, Brazil

2. Embrapa Mandioca e Fruticultura Tropical, Brazil

Abstract

ABSTRACT The objective of the present work was to compare selection indexes focused on the selection of forage cactus (Opuntia ficus-indica) accessions at initial generations. Sixty-five accessions from different locations in the semiarid region of the state of Bahia, Brazil, were evaluated in a randomized complete block design with three replications. Agronomic and bromatological traits were evaluated. The genetic parameters were predicted by using mixed models (REML/BLUP). The linear correlation degree between variables was estimated through Pearson's correlation analysis. Selection gains were predicted using four selection indexes: Smith-Hazel index, with two combinations of economic weights; rank sum index of Mulamba and Mock; and Elston's multiplicative index. The selection intensity applied was 30%, which allowed the selection of the 20 best accessions. The analysis of deviance showed significant effect for all traits. The estimate of genetic parameters evidenced the existence of genetic variability for the O. ficus-indica accessions. The Smith-Hazel index (combination 1) was important for primary (fresh weight and cladode dry weight) and bromatological traits (acid detergent fiber and neutral detergent fiber), expressing higher selection gains than the other indexes. The rank sum and multiplicative indexes resulted in selection gains for most evaluated traits. The results of accessions 2, 4, 5, 7, 9, 11, 14, 15, 18, 26, 27, 34, 37, 38, 39, 41, 45, 49, 51, 52, 53, and 58 were promising for their inclusion in breeding programs, as they were selected by at least two of the four selection indexes used.

Publisher

FapUNIFESP (SciELO)

Subject

General Agricultural and Biological Sciences

Reference25 articles.

1. Official Methods of Analysis,2019

2. Modelos biométricos aplicados ao melhoramento genético;CRUZ C. D.,2012

3. Progresso genético a partir de índices de seleção aplicado no melhoramento intrapopulacional do maracujazeiro azedo;DALBOSCO E. Z.;Amazonian Journal of Agricultural and Environmental Sciences,2019

4. A weight free index for the purpose of ranking or selection with respect to several traits at a time;ELSTON R. C.;Biometrics,1963

5. Usefulness of the HMRPGV method for simultaneous selection of upland cotton genotypes with greater fiber length and high yield stability;FARIAS F. J. C.;Genetics and Molecular Research,2016

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3