Root traits and yield in sugar beet: identification of AFLP markers associated with root elongation rate

被引:16
作者
Stevanato, Piergiorgio [1 ]
Trebbi, Daniele [2 ]
Saccomani, Massimo [1 ]
机构
[1] Univ Padua, Dipartimento Biotecnol Agr, I-35020 Legnaro, PD, Italy
[2] Keygene NV, NL-6708 PW Wageningen, Netherlands
关键词
Edaphic stresses; Root apparatus; Quantitative trait loci; Sugar beet; QTL CONTROLLING ROOT; GENOTYPIC VARIATION; BETA-VULGARIS; SULFATE UPTAKE; USE EFFICIENCY; MAIZE HYBRIDS; MAPPING QTLS; WATER; GROWTH; RICE;
D O I
10.1007/s10681-009-0042-1
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Morpho-physiological and molecular analysis were conducted to identify useful root indexes of sugar beet nutrient uptake capacity and productivity. Root architectural parameters, root elongation rate, sulfate uptake rate and glucose and fructose content in the root apex, traits involved in the plant response to sulfate stress, were evaluated in 18 sugar beet genotypes characterized by different root yield. Morpho-physiological traits, determined on 11-day-old seedlings grown in hydroponics under sulfate deprivation, showed variations from 59 to 197% and were significantly correlated (P < 0.01) with root yield. Under field conditions, the highest root yield genotype (L18), which has the highest root phenotypic values following sulfate shortage, also showed the greatest root length density and leaf relative water content, with respect to the lowest root yield genotype (L01). Bulk segregant analysis based on AFLP analysis, done on a segregating progeny obtained from the cross between the two lines L01 x L18, allowed the identification of two AFLP markers associated to the root elongation rate parameter that showed the highest variation among all the analyzed root traits. The genetic diversity of root adaptive traits and the use of marker-assisted selection aimed at increasing sugar yield under water and nutrient stress in sugar beet breeding programmes are discussed.
引用
收藏
页码:289 / 298
页数:10
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