Record Details

Genetic gains with genomic versus phenotypic selection for drought and waterlogging tolerance in tropical maize (Zea mays L.)

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Genetic gains with genomic versus phenotypic selection for drought and waterlogging tolerance in tropical maize (Zea mays L.)
Genetic gains with genomic versus phenotypic selection for drought and waterlogging tolerance in tropical maize (Zea mays L.)
Genetic gains with genomic versus phenotypic selection for drought and waterlogging tolerance in tropical maize (Zea mays L.)
 
Creator Das RN
Vinyan MT
Seetharam K
Patel M
Phagna RK
Singh SB
Shahi JP
Sarma A
Barua NS
Babu Raman
Zaidi PH
 
Subject Drought
Genomic selection
Phenotypic selection
Waterlogging
Maize
 
Description Not Available
Abstract
Erratic rainfall often results in intermittent drought and/or waterlogging and limits maize (Zea mays L.) productivity in many parts of the Asian tropics. Developing climate-resilient maize germplasm possessing tolerance to these key abiotic stresses without a yield penalty under optimal growing conditions is a challenge for breeders working in stress-vulnerable agro-ecologies in the region. Breeding stress-resilient maize for rainfed stress-prone ecologies is identified as one of the priority areas for CIMMYT-Asia maize program. We applied rapid cycle genomic selection (RCGS) on two multiparent yellow synthetic populations (MYS-1 and MYS-2) to improve grain yield simultaneously under drought and waterlogging conditions using genomic-estimated breeding values (GEBVs). Also, the populations were simultaneously advanced using recurrent phenotypic selection (PS) by exposing them to managed drought and waterlogging and intermating tolerant plants from the two selection environments. Selection cycles per se (C1, C2, and C3) of the two populations developed using RCGS and PS approach and their test-cross progenies were evaluated separately in multilocation trials under managed drought, waterlogging, and optimal moisture conditions. Significant genetic gains were observed with both GS and PS, except with PS in MYS-2 under drought and with GS in MYS-1 under waterlogging. Realized genetic gains from GS were relatively higher under drought conditions (110 and 135 kg ha−1 year−1) compared to waterlogging (38 and 113 kg ha−1 year−1) in both MYS-1 and MYS-2, respectively. However, under waterlogging stress PS showed at par or better than GS as gain per year with PS was 80 and 90 kg ha−1, whereas with GS it was 90 and 43 kg ha−1 for MYS-1 and MYS-2, respectively. Our findings suggested that careful constitution of a multiparent population by involving trait donors for targeted stresses, along with elite high-yielding parents from diverse genetic background, and its improvement using RCGS is an effective breeding approach to build multiple stress tolerance without compromising yield when tested under optimal conditions
Not Available
 
Date 2023-02-24T03:07:49Z
2023-02-24T03:07:49Z
2021-12-01
 
Type Research Paper
 
Identifier Das RN, Vinyan MT, Seetharam K, Patel M, Phagna RK, Singh SB, Shahi JP, Sarma A, Barua NS, Babu Raman and Zaidi PH.2021. Genetic gains with genomic versus phenotypic selections for drought and water logging in tropical maize (Zea mays). The Crop Journal. https://doi.org/1.1016ij.cj.2021.03.0312-
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/76409
 
Language English
 
Relation Not Available;
 
Publisher Crop Journal