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Replication data for Identification of QTL for early vigor and stay-green conferring tolerance to drought in two connected advanced backcross populations in tropical maize (Zea mays L.)

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Title Replication data for Identification of QTL for early vigor and stay-green conferring tolerance to drought in two connected advanced backcross populations in tropical maize (Zea mays L.)
 
Identifier https://hdl.handle.net/11529/10612
 
Creator Trachsel, Samuel
Sun, Dapeng
San Vicente, Felix
Zheng, Hongjian
Atlin, Gary N.
Suarez, Edgar Antonio
Babu, Raman
Zhang, Xuecai
 
Publisher CIMMYT Research Data & Software Repository Network
 
Description Replication data for: Identification of QTL for early vigor and stay-green conferring tolerance to drought in two connected advanced backcross populations in tropical maize (Zea mays L.) We aimed to identify quantitative trait loci (QTL) for secondary traits related to grain yield (GY) in two BC1F2:3 backcross populations (LPSpop and DTPpop) under well-watered (4 environments; WW) and drought stressed (6; DS) conditions to facilitate breeding efforts towards drought tolerant maize. Out of the 105 detected QTL, 53 were overdominant indicative of strong heterosis. For 14 out of 18 detected vigor QTL, as well as for eight flowering time QTL the trait increasing allele was derived from CML491. Improving drought tolerance while at the same time maintaining yield potential could be achieved by combining alleles conferring early vigor from the recurrent parent with alleles advancing flowering from the donor. The highest yielding ten entries for all population-by-irrigation treatment combination (except LPSpop WW) used in this study outyielded the best check (CML312/CML444) by 32.5% (DTPpop WW) to 60% (DTPpop DS). Moreover three entries (((CML491/DTPWC9F104)//CML491)B2/CML503; ((CML491/LPSC7F64)//CML491)B154/CML503; ((CML491/LPSC7F64)//CML491)B218/CML503) ranked within the top ten across irrigation treatments. Best performing entries identified here under drought can therefore be used as new trait donor using phenotypic and/or molecular selection.
 
Subject Agricultural Sciences
Agricultural research
Maize
Zea Mays
Field experimentation
Crop performance
Days to Anthesis
Days To Silking
Ear Height
Ear Rot Total
FAW
Field Weight
Fusarium Moniliforme
Grain Texture
Husk Cover
Lodging
Number of Ears
Plant Height
Plant Stand Number
Rolling
Root Lodging
Senescence
Shelled Grain Weight
Stalk Lodging
Stalk Rot
Stem Lodging
 
Language English
 
Date 2016
 
Contributor Trachsel, Samuel
 
Type Experimental Data