Genetic diversity in elite inbred lines of maize and its association with heterosis
Genetic diversity in elite inbred lines of maize and its association with heterosis
复制标题
DOI：
10.4238/2015.june.12.3
复制
发表时间：
2015-01-01
影响因子：
0.4
通讯作者：
Coan, M. M. D.
中科院分区：
文献类型：
--
作者：
Fernandes, E. H.;Schuster, I.;Coan, M. M. D.
本研究的目的是应用分子标记（微卫星）对保存在巴西Cooperativa Central de Pesquisa Agricola-Coodetec库中的48个玉米优良种质系的遗传多样性进行分析，并估计遗传距离与杂种优势和杂交表现之间的相关性。44个随机引物共扩增出124条多态性片段。产量和杂种优势与遗传距离的相关性均不显著。然而，研究结果表明，从极端距离的数据可以用于育种更有效的杂交组合和杂种优势。因此，分子标记是预测杂种表现的有效工具。
The objective of the current study was to apply molecular markers (microsatellites) in the analysis of genetic diversity of 48 lines of the elite maize germplasm stored in the bank of the Cooperativa Central de Pesquisa Agricola - Coodetec, PR, Brazil, and estimate the correlation between genetic distance and heterosis and hybrid performance from the crosses among these maize lines. Forty-four random primers were used and amplification of 124 polymorphic fragments was obtained. The expected findings from the correlation of the yield and heterosis with the genetic distance were non-significant. However, the results suggested that data from the extreme distances could be used in breeding for more productive crosses and heterotic hybrids. Thereby, molecular markers are efficient tools for predicting hybrid performance.