IngentaConnect QTL mapping of nutrient components in maize kernels under low nit...

Authors: Liu, Z. H.¹; Xie, H. L.¹; Tian, G. W.¹; Chen, S. J.²; Wang, C. L.¹; Hu, Y. M.¹; Tang, J. H.

Source: Plant Breeding, Volume 127, Number 3, June 2008 , pp. 279-285(7)

Abstract:

A set of 213 F_2:3 families were used to investigate the effects of nitrogen (N) on grain yield and the concentrations of three nutrient components in maize (Zea mays L.) kernels. A genetic linkage map was constructed using 189 SSR (simple sequence repeat) markers, spanning a total of 2003 cM, including 11 linkages, and the families were evaluated under high N and low N conditions at two farm locations. The results indicate that low N conditions may induce an increase in starch concentration, but a decrease in protein levels. Twenty-six quantitative trait loci (QTL) were detected for four measured traits in the two N treatments at both locations, including eight QTL for grain yield, seven QTL for oil content, six QTL for protein content and five QTL for starch content. The total number of QTL detected for the four measured traits under high N levels was greater than the QTL detected under low N conditions, and several QTL were identified that specifically expressed under different N conditions. These particular QTL could help provide greater understanding of the genetic basis of N-usage efficiency.

Keywords: low nitrogen stress; nutrient content; QTL analysis; maize (Zea mays L.)

Document Type: Research article

DOI: 10.1111/j.1439-0523.2007.01465.x

Affiliations: 1: College of Agronomy, Henan Agricultural University, Zhengzhou, Henan 450002 2: National Maize Improvement Center of China, China Agricultural University, Beijing 100094, China

The full text electronic article is available for purchase. You will be able to download the full text electronic article after payment.

$50.39 plus tax Refund Policy

QTL mapping of nutrient components in maize kernels under low nitrogen conditions