<mods:mods version="3.3" xsi:schemaLocation="http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-3.xsd" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><mods:titleInfo><mods:title>Drought (WS) and low phosphorus (LP) stress in groundnut: Water extraction pattern and tolerance related traits for breeding program</mods:title></mods:titleInfo><mods:name type="personal"><mods:namePart type="given">F</mods:namePart><mods:namePart type="family">Hamidou</mods:namePart><mods:role><mods:roleTerm type="text">author</mods:roleTerm></mods:role></mods:name><mods:name type="personal"><mods:namePart type="given">M</mods:namePart><mods:namePart type="family">Heynikoye</mods:namePart><mods:role><mods:roleTerm type="text">author</mods:roleTerm></mods:role></mods:name><mods:name type="personal"><mods:namePart type="given">O</mods:namePart><mods:namePart type="family">Halilou</mods:namePart><mods:role><mods:roleTerm type="text">author</mods:roleTerm></mods:role></mods:name><mods:name type="personal"><mods:namePart type="given">H D</mods:namePart><mods:namePart type="family">Upadhyaya</mods:namePart><mods:role><mods:roleTerm type="text">author</mods:roleTerm></mods:role></mods:name><mods:name type="personal"><mods:namePart type="given">V</mods:namePart><mods:namePart type="family">Vadez</mods:namePart><mods:role><mods:roleTerm type="text">author</mods:roleTerm></mods:role></mods:name><mods:abstract>Drought (WS) and low soil phosphorus (LP) are major constraints&#13;
of groundnut productivity. This study aims to (i) understand&#13;
the relative importance of phosphorus (P) deficiency, water&#13;
stress and their interaction, (ii )investigate water extraction&#13;
pattern under WS and LP, and (iii) identify field and controlled&#13;
conditions measured traits related to better performance of genotypes&#13;
under WS and LP. Six groundnut varieties were assessed&#13;
under field and lysimetre conditions. Two water regimes (WW,&#13;
WS) and 2 phosphorus treatments (HP, LP) were imposed. Leaf&#13;
Area Index (LAI), roots volume (RV), length density (RLD) and&#13;
roots dry matter (RDM), water extraction (WEx), transpiration&#13;
efficiency (TE), soil moisture content (SMC) and yield were investigated.&#13;
LP stress decreased LAI and pod weight (Pwt) (42&#13;
and 28 % respectively). ICGV 12991 and 12CS-116 varieties&#13;
showed the highest LAI and Pwt. LAI, correlated to Pwt(r2 =&#13;
0.77), revealed relevant trait for LP tolerance.LP and WS decreased&#13;
roots and canopy measured traits. WS and LP decreased&#13;
WEx (51 and 7% respectively). Combined LP and WS (WS-LP)&#13;
decreased WEx up to 60%. ICG 12991 and 12CS-116 showed the&#13;
highest WEx, RLD and RDM under WS-LP; RLDcould contribute&#13;
to water uptake to avoid dehydration. Significant genotypic&#13;
variation observed on SMC revealed different pattern of WEx.&#13;
TE increased under WS and decreased under LP; factors driving&#13;
TE would be different.12CS-116, 55-437 and ICG 12991 revealed&#13;
high TEand tolerant to WS-LP but showed different tolerance&#13;
mechanism. This study revealed that ICG 12991 and 12CS-116&#13;
were tolerant to WS-LP and LAI, RLD, while WEx and TE revealed&#13;
relevant traits for groundnut improvement.</mods:abstract><mods:classification authority="lcc">Abiotic Stress</mods:classification><mods:classification authority="lcc">Crop Improvement</mods:classification><mods:classification authority="lcc">Plant Breeding</mods:classification><mods:classification authority="lcc">Groundnut</mods:classification><mods:originInfo><mods:dateIssued encoding="iso8061">2017-02</mods:dateIssued></mods:originInfo><mods:genre>Conference or Workshop Item</mods:genre></mods:mods>