Low-nitrogen stress tolerance and nitrogen agronomic efficiency among maize inbreds : comparison of multiple indices and evaluation of genetic variation

By:

Yongsheng Wu

Contributor(s):

Material type: Article

ArticleLanguage: English Publication details: Dordrecht (Netherlands) : Springer, 2011.ISSN:

1573-5060 (Online)
0014-2336

Subject(s):

Online resources:

Access only for CIMMYT Staff

In: Euphytica v. 180, no. 2, p. 281-290Summary: Limited information is available on genetic variation in low-nitrogen (low-N) stress tolerance and N-use efficiency (NUE) among maize inbreds. To unveil this information, a panel of 189 diverse maize inbred lines was evaluated under contrasting levels of N availability over 2 years. Low-N agronomic efficiency (LNAE), absolute grain yield (GY) at low-N conditions, and the ratio between GY at low-N and optimum-N conditions were taken into account to represent low-N tolerance. Additionally, N-agronomic efficiency (NAE) along with other agronomic traits was also analyzed. Analysis of variance revealed significant effects of genotype on LNAE, NAE, and GY. The estimated broad-sense heritability was 0.38 for LNAE while it was only 0.11 for NAE, implying that selection based on LNAE should be more effective than NAE. LNAE exhibited highly positive genotypic and phenotypic correlations with GY, ear kernel number (EKN), kernel weight, plant height (PH), and chlorophyll content at low-N conditions, while it was negatively correlated with grain-N content and anthesis-silking interval. Path analysis indicated that the EKN at low-N stress had the highest positive effects on LNAE.

Tags from this library: No tags from this library for this title. Log in to add tags.

Average rating: 0.0 (0 votes)

Holdings
Item type	Current library	Collection	Call number	Status	Date due	Barcode	Item holds
Article	CIMMYT Knowledge Center: John Woolston Library	CIMMYT Staff Publications Collection	CIS-6367 (Browse shelf(Opens below))	Available

Total holds: 0

Browsing CIMMYT Knowledge Center: John Woolston Library shelves, Collection: CIMMYT Staff Publications Collection Close shelf browser (Hides shelf browser)

Previous								Next
Previous	CIS-6364 Comparative SNP and haplotype analysis reveals a higher genetic diversity and rapider LD decay in tropical than temperate germplasm in maize	CIS-6365 Large-scale screening for maize drought resistance using multiple selection criteria evaluated under water-stressed and well-watered environments	CIS-6366 Revisiting the hetero-fertilization phenomenon in maize	CIS-6367 Low-nitrogen stress tolerance and nitrogen agronomic efficiency among maize inbreds : comparison of multiple indices and evaluation of genetic variation	CIS-6368 A systems and partnership approach to agricultural research for development : lessons from Ethiopia	CIS-6369 Agricultural technology adoption, seed access constraints and commercialization in Ethiopia	CIS-637 En Alternate recurrent selection among S1 lines followed by among and within half SIBS family selection	Next

Peer review

Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0014-2336

Limited information is available on genetic variation in low-nitrogen (low-N) stress tolerance and N-use efficiency (NUE) among maize inbreds. To unveil this information, a panel of 189 diverse maize inbred lines was evaluated under contrasting levels of N availability over 2 years. Low-N agronomic efficiency (LNAE), absolute grain yield (GY) at low-N conditions, and the ratio between GY at low-N and optimum-N conditions were taken into account to represent low-N tolerance. Additionally, N-agronomic efficiency (NAE) along with other agronomic traits was also analyzed. Analysis of variance revealed significant effects of genotype on LNAE, NAE, and GY. The estimated broad-sense heritability was 0.38 for LNAE while it was only 0.11 for NAE, implying that selection based on LNAE should be more effective than NAE. LNAE exhibited highly positive genotypic and phenotypic correlations with GY, ear kernel number (EKN), kernel weight, plant height (PH), and chlorophyll content at low-N conditions, while it was negatively correlated with grain-N content and anthesis-silking interval. Path analysis indicated that the EKN at low-N stress had the highest positive effects on LNAE.

Global Maize Program

Text in English

CIMMYT Informa No. 1767|Springer

INT2735

CIMMYT Staff Publications Collection

Click on an image to view it in the image viewer

Knowledge Center Catalog

Low-nitrogen stress tolerance and nitrogen agronomic efficiency among maize inbreds : comparison of multiple indices and evaluation of genetic variation

Browsing CIMMYT Knowledge Center: John Woolston Library shelves, Collection: CIMMYT Staff Publications Collection Close shelf browser (Hides shelf browser)

International Maize and Wheat Improvement Center (CIMMYT) © Copyright 2021.
Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
If you have any question, please contact us at
CIMMYT-Knowledge-Center@cgiar.org

Knowledge Center Catalog

Low-nitrogen stress tolerance and nitrogen agronomic efficiency among maize inbreds : comparison of multiple indices and evaluation of genetic variation

Browsing CIMMYT Knowledge Center: John Woolston Library shelves, Collection: CIMMYT Staff Publications Collection Close shelf browser (Hides shelf browser)

International Maize and Wheat Improvement Center (CIMMYT) © Copyright 2021. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237. If you have any question, please contact us at CIMMYT-Knowledge-Center@cgiar.org

International Maize and Wheat Improvement Center (CIMMYT) © Copyright 2021.
Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
If you have any question, please contact us at
CIMMYT-Knowledge-Center@cgiar.org