Estimation of genetic gains by different selection criteria in biofortified mini lettuce genotypes

IF 0.6 4区农林科学 Q4 AGRONOMY

Bioagro Pub Date : 2023-08-31 DOI:10.51372/bioagro353.1

Ana Carolina P. Jacinto, R. Castoldi, I. G. da Silva, Glecia J. Dos S. Carmo, G. Maciel, É. A. Moreira, Hamilton César De O. Charlo, R. R. Finzi

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Abstract

The development of mini lettuce genotypes with good agronomic characteristics are fundamental to launch new cultivars. Thus, the objective was to compare the variability of biofortified mini lettuce genotypes by analyzing its principal components and hierarchical clusters and evaluate different selection indices to estimate selection gain. The experiment was carried out at the Federal University of Uberlândia in a randomized block design implemented with 11 treatments (10 genotypes of mini lettuce generation F5:6 and one mini lettuce commercial cultivar) and four repetitions. The following variables were evaluated: chlorophyll content (SPAD índex), stem diameter and length, plant diameter and height, number of leaves per plant, fresh mass of the aerial part, and bolting tolerance. The data were submitted to analysis of variance and genotypes were compared using the Scott-Knott test (P≤0.05). Additionally, principal components, hierarchical clusters, and correlation were evaluated (P≤0.05). The best genotypes were chosen by appropriate direct and indirect selection and the main indices: William’s index, selection index from Smith and Hazel, and Mulamba y Mock index. There were five groups and a significant negative correlation of all agronomic characteristics evaluated with resistance to bolting, except stem length. William’s index provided a balanced distribution of genetic gains by selecting the genotypes UFU 66#8, UFU 215#2, UFU 215#7 and UFU 215#13.

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利用不同选择标准估算生物强化迷你生菜基因型的遗传增益

开发具有优良农艺性状的微型生菜基因型是培育新品种的基础。因此，目的是通过分析其主成分和层次聚类来比较生物强化迷你生菜基因型的变异性，并评估不同的选择指标来估计选择增益。试验在印度联邦大学进行，采用随机区组设计，共11个处理(10个基因型的迷你生菜F5:6代和1个迷你生菜商品品种)，4个重复。评估了以下变量:叶绿素含量(SPAD índex)、茎粗和茎长、株径和株高、单株叶数、地上部分鲜质量和抽苔耐受性。数据进行方差分析，基因型比较采用Scott-Knott检验(P≤0.05)。并对主成分、层次聚类和相关性进行评价(P≤0.05)。通过适当的直接选择和间接选择，以威廉氏指数、史密斯和黑兹尔的选择指数和穆拉姆巴-莫克指数为主要指标，筛选出最佳基因型。除茎长外，其余农艺性状均与抽苔抗性呈显著负相关。通过选择基因型UFU 66#8、UFU 215#2、UFU 215#7和UFU 215#13，威廉指数提供了遗传收益的平衡分布。

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来源期刊

Bioagro Agricultural and Biological Sciences-General Agricultural and Biological Sciences

CiteScore

1.40

自引率

37.50%

发文量

期刊介绍： Bioagro es una revista científica del Decanato de Agronomía de la Universidad Centroccidental “Lisandro Alvarado” (UCLA). Su periodicidad es cuatrimestral y se publica en los meses de enero, mayo y septiembre. Cada trabajo es revisado por al menos dos especialistas en el área, externos a la revista, de cuya opinión depende la aceptación definitiva. Se utiliza sistema de arbitraje doble ciego. La revista va dirigida, fundamental pero no exclusivamente, a profesionales y técnicos del área agrícola. Su objetivo es publicar trabajos científicos originales e inéditos en ciencias agrícolas que enfoquen aspectos de agronomía, botánica y propagación de plantas, entomología y zoología, suelos, fitopatología y protección vegetal, ingeniería agrícola, genética y mejoramiento de plantas, ecología, procesamiento de productos agrícolas, biotecnología y sociales. También pueden ser publicados artículos cortos en los que se presenten descubrimientos científicos, desarrollos tecnológicos y resultados de diagnósticos integrales, en la modalidad de Notas Técnicas. En Venezuela, se encuentra en las bibliotecas de todas las universidades e institutos de educación superior que ofrecen carreras agronómicas, así como de los entes oficiales de investigación agropecuaria. En el exterior, la revista llega a universidades y/o institutos de investigación agrícolas de todos los países de América Latina así como Estados Unidos, Canadá y España.