Shoot yield drives phosphorus use efficiency in Brassica oleracea and correlates with root architecture traits
Shoot yield drives phosphorus use efficiency in Brassica oleracea and correlates with root architecture traits
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DOI：
10.1093/jxb/erp083
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发表时间：
2009-05-01
影响因子：
6.9
通讯作者：
Greenwood, Duncan J.
中科院分区：
文献类型：
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作者：
Hammond, John P.;Broadley, Martin R.;Greenwood, Duncan J.
使用无机磷肥来维持作物产量和质量的环境和财务成本很高。培育更有效地获取和利用磷的作物可以降低这些成本。测定了355个甘蓝品种地上部磷含量和磷利用效率的差异。加入，74个当前的商业品种，和90个双单倍体（DH）作图系从参考遗传作图群体。加入生长在两个或两个以上的外部P浓度在温室实验中，商业和DH加入也生长在复制的田间实验。在B中观察到的芽磷和各种PUE的多样性。目前的商业栽培品种具有比偶然预期的更高的PUE。这可能是育种增加产量的结果，这是大多数PUE措施或早期建立的重要组成部分。根的发育和结构与PUE相关，特别是侧根的数量，长度和生长速度。与芽P和PUE相关的显著数量性状位点位于染色体C3和C7上。这些数据提供了信息，以启动育种计划，以提高PUE在B。甘蓝。
The environmental and financial costs of using inorganic phosphate fertilizers to maintain crop yield and quality are high. Breeding crops that acquire and use phosphorus (P) more efficiently could reduce these costs. The variation in shoot P concentration (shoot-P) and various measures of P use efficiency (PUE) were quantified among 355 Brassica oleracea L. accessions, 74 current commercial cultivars, and 90 doubled haploid (DH) mapping lines from a reference genetic mapping population. Accessions were grown at two or more external P concentrations in glasshouse experiments; commercial and DH accessions were also grown in replicated field experiments. Within the substantial species-wide diversity observed for shoot-P and various measures of PUE in B. oleracea, current commercial cultivars have greater PUE than would be expected by chance. This may be a consequence of breeding for increased yield, which is a significant component of most measures of PUE, or early establishment. Root development and architecture correlate with PUE; in particular, lateral root number, length, and growth rate. Significant quantitative trait loci associated with shoot-P and PUE occur on chromosomes C3 and C7. These data provide information to initiate breeding programmes to improve PUE in B. oleracea.