Abstract
Dry bean (Phaseolus vulgaris L.) is usually considered to be poor at biological nitrogen fixation (BNF), but large variations in this trait have been observed among bean genotypes. We evaluated 16 bean genotypes for N 2 fixation ability in four N treatments: (i) uninoculated in low-N soil (30 kg N ha −1 ), (ii) inoculated with commercial Rhizobium leguminosarum bv. phaseoli inoculant Nitrastik-D ® in low-N soil, (iii) inoculated with commercial R. leguminosarum bv. phaseoli inoculant Nodulator ® in low-N soil, and (iv) uninoculated in high-N soil (100 kg N ha −1 ). There were differences between genotypes in all the plant parameters that were measured, but only nodulation was affected by N treatment. The 100 kg N ha −1 treatment suppressed nodulation. Seven genotypes nodulated well with either inoculant, two genotypes nodulated better with Nitrastik-D than with Nodulator, three nodulated better with Nodulator than with Nitrastik-D, and four nodulated poorly with either inoculant. Cultivars AC Redbond, Island, and Resolute, all currently commercially grown, did not fix much N 2 at flowering (4–8 kg N ha −1 ) or maturity (19–34 kg N ha −1 ). By contrast, germplasm lines PI 136692 (red bean), GH-196 (pinto bean), and LEF2RB (carioca bean) had high BNF capability at flowering (10–11 kg N ha −1 ) and especially at maturity (60–72 kg N ha −1 ), in addition to high seed yield (2778–2897 kg ha −1 ), indicating their superior ability to support both of these economically important traits throughout plant growth. These three genotypes would be valuable to breeders for the genetic improvement of BNF in dry bean cultivars.
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Claims 12
Claim · model-written summary
Dry bean genotypes differed in all plant parameters measured.
Verbatim
t0“dry bean”
e0“There were differences between genotypes in all the plant parameters that were measured”
Claim · model-written summary
The 100 kg N ha-1 treatment suppressed nodulation in dry bean.
Not reportedComparator
Verbatim
t0“dry bean”
e0“The 100 kg N ha −1 treatment suppressed nodulation”
Claim · model-written summary
Seven dry bean genotypes nodulated well with either inoculant.
Verbatim
t0“dry bean”
e0“Seven genotypes nodulated well with either inoculant”
Claim · model-written summary
Two dry bean genotypes nodulated better with Nitrastik-D than with Nodulator.
Verbatim
t0“dry bean”
e0“two genotypes nodulated better with Nitrastik-D than with Nodulator”
Claim · model-written summary
Three dry bean genotypes nodulated better with Nodulator than with Nitrastik-D.
Verbatim
t0“dry bean”
e0“three nodulated better with Nodulator than with Nitrastik-D”
Claim · model-written summary
Four dry bean genotypes nodulated poorly with either inoculant.
Verbatim
t0“dry bean”
e0“four nodulated poorly with either inoculant”
Claim · model-written summary
Cultivars AC Redbond, Island and Resolute fixed little N2 at flowering (4-8 kg N ha-1).
Verbatim
t0“dry bean”
e0“Cultivars AC Redbond, Island, and Resolute, all currently commercially grown, did not fix much N 2 at flowering (4–8 kg N ha −1 ) or maturity (19–34 kg N ha −1 )”
Claim · model-written summary
Cultivars AC Redbond, Island and Resolute fixed little N2 at maturity (19-34 kg N ha-1).
Verbatim
t0“dry bean”
e0“Cultivars AC Redbond, Island, and Resolute, all currently commercially grown, did not fix much N 2 at flowering (4–8 kg N ha −1 ) or maturity (19–34 kg N ha −1 )”
Claim · model-written summary
Germplasm lines PI 136692, GH-196 and LEF2RB had high biological N fixation at flowering (10-11 kg N ha-1).
Verbatim
t0“dry bean”
e0“germplasm lines PI 136692 (red bean), GH-196 (pinto bean), and LEF2RB (carioca bean) had high BNF capability at flowering (10–11 kg N ha −1 ) and especially at maturity (60–72 kg N ha −1 ), in addition to high seed yield (2778–2897 kg ha −1 )”
Claim · model-written summary
Germplasm lines PI 136692, GH-196 and LEF2RB had especially high biological N fixation at maturity (60-72 kg N ha-1).
Verbatim
t0“dry bean”
e0“germplasm lines PI 136692 (red bean), GH-196 (pinto bean), and LEF2RB (carioca bean) had high BNF capability at flowering (10–11 kg N ha −1 ) and especially at maturity (60–72 kg N ha −1 ), in addition to high seed yield (2778–2897 kg ha −1 )”
Claim · model-written summary
Germplasm lines PI 136692, GH-196 and LEF2RB also had high seed yield (2778-2897 kg ha-1).
Verbatim
t0“dry bean”
e0“germplasm lines PI 136692 (red bean), GH-196 (pinto bean), and LEF2RB (carioca bean) had high BNF capability at flowering (10–11 kg N ha −1 ) and especially at maturity (60–72 kg N ha −1 ), in addition to high seed yield (2778–2897 kg ha −1 )”
Claim · model-written summary
The authors recommend the three high-BNF genotypes as valuable to breeders for genetic improvement of BNF in dry bean cultivars.
Verbatim
e0“These three genotypes would be valuable to breeders for the genetic improvement of BNF in dry bean cultivars”
The same questions in other papers
nitrogen · symbiosis · Phaseolus vulgaris (common bean)Results differ
21 papers in the same direction as this paper · 9 in the opposite direction
- negative
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See all 31 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.