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Estimation of phenotypic variability in symbiotic nitrogen fixation ability of common bean under drought stress using 15 N natural abundance in grain

View Article: PubMed Central - PubMed

ABSTRACT

New method was used to estimate symbiotic nitrogen fixation ability in bean.

Phenotypic variation in nitrogen fixation was observed under drought stress.

Four lines were superior in their ability to fix nitrogen under drought stress.

Several lines were found to combine drought resistance with ability to fix nitrogen.

Several lines were found to combine drought resistance with ability to fix nitrogen.

No MeSH data available.


Related in: MedlinePlus

Identification of genotypes that combine greater values of %nitrogen derived from the atmosphere using grain tissue (%Ndfa-G) with higher values of nitrogen use efficiency (NUE) in terms of kg of grain produced kg−1 of shoot N uptake under drought conditions when grown in a Mollisol at CIAT-Palmira, Colombia. Higher%Ndfa-G genotypes with greater values of NUE were identified in the upper, right hand quadrant.
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fig0020: Identification of genotypes that combine greater values of %nitrogen derived from the atmosphere using grain tissue (%Ndfa-G) with higher values of nitrogen use efficiency (NUE) in terms of kg of grain produced kg−1 of shoot N uptake under drought conditions when grown in a Mollisol at CIAT-Palmira, Colombia. Higher%Ndfa-G genotypes with greater values of NUE were identified in the upper, right hand quadrant.

Mentions: A positive and highly significant correlation was observed between grain yield and nitrogen use efficiency (NUE) under both irrigated and drought conditions (Table 1). Genotypes that combined better grain yield with higher NUE under drought conditions were RCB 593, SMC 141, BFS 32, BFS 29, SEA 15, SEN 56, NCB 280 and NCB 226. A low but significant correlation coefficient (r = 0.19**) was observed between %Ndfa and NUE under drought conditions. The lines RCB 593, SMC 141, BFS 32, BFS 29, SEA 15, SEN 56, NCB 280 and NCB 226 combined higher values of NUE and %Ndfa under drought stress (Fig. 4). The commercial cultivar Pérola showed a moderate value of %Ndfa but it was poor in its NUE and was low yielding under drought (Fig. 4).


Estimation of phenotypic variability in symbiotic nitrogen fixation ability of common bean under drought stress using 15 N natural abundance in grain
Identification of genotypes that combine greater values of %nitrogen derived from the atmosphere using grain tissue (%Ndfa-G) with higher values of nitrogen use efficiency (NUE) in terms of kg of grain produced kg−1 of shoot N uptake under drought conditions when grown in a Mollisol at CIAT-Palmira, Colombia. Higher%Ndfa-G genotypes with greater values of NUE were identified in the upper, right hand quadrant.
© Copyright Policy - CC BY
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4998141&req=5

fig0020: Identification of genotypes that combine greater values of %nitrogen derived from the atmosphere using grain tissue (%Ndfa-G) with higher values of nitrogen use efficiency (NUE) in terms of kg of grain produced kg−1 of shoot N uptake under drought conditions when grown in a Mollisol at CIAT-Palmira, Colombia. Higher%Ndfa-G genotypes with greater values of NUE were identified in the upper, right hand quadrant.
Mentions: A positive and highly significant correlation was observed between grain yield and nitrogen use efficiency (NUE) under both irrigated and drought conditions (Table 1). Genotypes that combined better grain yield with higher NUE under drought conditions were RCB 593, SMC 141, BFS 32, BFS 29, SEA 15, SEN 56, NCB 280 and NCB 226. A low but significant correlation coefficient (r = 0.19**) was observed between %Ndfa and NUE under drought conditions. The lines RCB 593, SMC 141, BFS 32, BFS 29, SEA 15, SEN 56, NCB 280 and NCB 226 combined higher values of NUE and %Ndfa under drought stress (Fig. 4). The commercial cultivar Pérola showed a moderate value of %Ndfa but it was poor in its NUE and was low yielding under drought (Fig. 4).

View Article: PubMed Central - PubMed

ABSTRACT

New method was used to estimate symbiotic nitrogen fixation ability in bean.

Phenotypic variation in nitrogen fixation was observed under drought stress.

Four lines were superior in their ability to fix nitrogen under drought stress.

Several lines were found to combine drought resistance with ability to fix nitrogen.

Several lines were found to combine drought resistance with ability to fix nitrogen.

No MeSH data available.


Related in: MedlinePlus