Heritability of oleic acid content in soybean seed oil and its genetic correlation with fatty acid and agronomic traits
Heritability of oleic acid content in soybean seed oil and its genetic correlation with fatty acid and agronomic traits
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DOI：
10.2135/cropsci2008.01.0049
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发表时间：
2008-09-01
期刊：
影响因子：
2.3
通讯作者：
Cardinal, Andrea J.
中科院分区：
文献类型：
--
作者：
Bachlava, Eleni;Burton, Joseph W.;Cardinal, Andrea J.
油酸含量对大豆的营养价值和氧化稳定性具有重要意义。[MERR.]种子油。油酸含量较高的选择反应取决于其在育种群体中的遗传力，其他脂肪酸和农艺性状对油酸含量选择的相关反应取决于它们与油酸的遗传相关性。本研究的目的是估计油酸含量的遗传力，并确定油酸与其他脂肪酸和农艺性状的相关性，以分离生长在多个环境中的油酸基因。其中一个群体由721个品系组成，为遗传参数的估计提供了良好的精度。本研究的结果表明，油酸含量的遗传力足够高，在单一环境下生长的未复制品系上进行早代选择是有效的。油酸与亚油酸、油酸与亚麻酸、油酸与棕榈酸均呈显著负相关。在分离油酸基因的一个群体中，棕榈酸和硬脂酸与降低棕榈酸含量的fap(NC)和fap1等位基因呈显著正相关。在同一群体中，产量与油酸含量呈显著负相关，与亚油酸、亚麻酸和棕榈酸含量呈正相关。
Oleate content is important for the nutritional value and oxidative stability of soybean [Glycine max (L.) Merr.] seed oil. Response to selection for higher oleate content depends on its heritability in breeding populations, and correlated responses of other fatty acid and agronomic traits to selection for oleate content depend on their genetic correlations with oleate. The objective of this study was to estimate the heritability of oleate content and to determine the correlation of oleate with other fatty acid and agronomic traits in three soybean populations segregating for major and minor oleate genes grown in multiple environments. One of the populations consisted of 721 lines, providing excellent precision for estimation of the genetic parameters. The results of this study indicated that heritability for oleate content was sufficiently high that early generation selection can be effective when practiced on unreplicated lines grown at a single environment. Significant negative correlations were observed between oleate and linoleate, oleate and linolenate, as well as oleate and palmitate in all three populations. Significant positive correlations were detected between palmitate and stearate in one population segregating for oleate genes and fap(nc) and fap1 alleles, which reduce palmitate content. In the same population we also observed a significant negative correlation between yield and oleate content, and positive correlations between yield and linoleate, and linolenate and palmitate contents.