Replication Data for: Evidence for genotypic differences among elite lines of common bean in the ability to remobilize photosynthate to increase yield under drought

Traits and genotypes related with resistance to intermittent and terminal drought stress. Three common bean elite lines (NCB 226, SEN 56, SER 125) were identified with superior levels of adaptation to both intermittent and terminal drought stress conditions. The greater performance of these lines under drought stress was associated with their ability to remobilize photosynthate to increase grain yield based on higher values of harvest index, pod harvest index, leaf area index and canopy biomass. Two wild bean germplasm accessions (G 19902, G 24390) showed very poor adaptation to both types of drought stress. One small-seeded black line (NCB 226) was superior in combining greater values of canopy biomass with greater ability to mobilize photosynthates to grain under both types of drought stress. Two small-seeded red lines (SER 78, SER 125) seem to combine the desirable traits of enhanced mobilization of photosynthates to seed with effective use of water through canopy cooling under terminal drought stress. Pod harvest index showed significant positive association with grain yield under both types of drought stress and this trait can be used by breeders as an additional selection method to grain yield in evaluation of breeding populations for both types of drought stress.本数据集涵盖与间歇性干旱及终末干旱胁迫抗性相关的性状与基因型。研究已鉴定出3个普通菜豆优良品系（NCB 226、SEN 56、SER 125），其对间歇性干旱与终末干旱胁迫均表现出优异的适应性。这些品系在干旱胁迫下的优异表现，与其可将光合产物再转运以提升籽粒产量的能力密切相关，该能力体现在其更高的收获指数（Harvest Index）、荚果收获指数（Pod Harvest Index）、叶面积指数（Leaf Area Index）与冠层生物量（Canopy Biomass）水平。另有2份野生菜豆种质资源（G 19902、G 24390）对这两类干旱胁迫的适应性均极差。1个小粒黑色菜豆品系（NCB 226）在两类干旱胁迫条件下，兼具更高的冠层生物量与更强的光合产物向籽粒转运能力。2个小粒红色菜豆品系（SER 78、SER 125）则兼具两项优良性状：一是可增强光合产物向种子的转运效率，二是在终末干旱胁迫下可通过冠层降温实现水分的高效利用。两类干旱胁迫下，荚果收获指数均与籽粒产量呈显著正相关，因此育种家可将该性状作为籽粒产量之外的辅助选择指标，用于两类干旱胁迫下的育种群体评价。