Underground heterosis for yield improvement in melon

Bibliographische Detailangaben
Veröffentlicht in:	Journal of experimental botany. - 1985. - 72(2021), 18 vom: 30. Sept., Seite 6205-6218
1. Verfasser:	Dafna, Asaf (VerfasserIn)
Weitere Verfasser:	Halperin, Ilan, Oren, Elad, Isaacson, Tal, Tzuri, Galil, Meir, Ayala, Schaffer, Arthur A, Burger, Joseph, Tadmor, Yaakov, Buckler, Edward S, Gur, Amit
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2021
Zugriff auf das übergeordnete Werk:	Journal of experimental botany
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't Cucumis melo genome-wide association study (GWAS) grafting half-diallel heterosis rootstock whole-genome resequencing (WGS) yield

Beschreibung
Zusammenfassung:	© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com. Heterosis, the superiority of hybrids over their parents, is a major genetic force associated with plant fitness and crop yield enhancement. We investigated root-mediated yield heterosis in melons (Cucumis melo) by characterizing a common variety grafted onto 190 hybrid rootstocks, resulting from crossing 20 diverse inbreds in a diallel-mating scheme. Hybrid rootstocks improved yield by more than 40% compared with their parents, and the best hybrid yield outperformed the reference commercial variety by 65% under both optimal and minimal irrigation treatments. To characterize the genetics of underground heterosis we conducted whole genome re-sequencing of the 20 founder lines, and showed that parental genetic distance was no predictor for the level of heterosis. Through inference of the 190 hybrid genotypes from their parental genomes, followed by genome-wide association analysis, we mapped multiple quantitative trait loci for root-mediated yield. Yield enhancement of the four best-performing hybrid rootstocks was validated in multiple experiments with four different scion varieties. Our grafting approach is complementary to the common roots genetic approach that focuses mainly on variation in root system architecture, and is a step towards discovery of candidate genes involved in root function and yield enhancement
Beschreibung:	Date Completed 20.10.2021 Date Revised 20.10.2021 published: Print Citation Status MEDLINE
ISSN:	1460-2431
DOI:	10.1093/jxb/erab219