Abstract
Legumes, including lentil, are a valuable source of carbohydrates, fiber, protein and vitamins and minerals. Their nutritional characteristics have been associated with a reduction in the incidence of various cancers, HDL cholesterol, type 2 diabetes and heart disease. Among these quality parameters, lectins have been associated with reducing certain forms of cancer, activating innate defense mechanisms and managing obesity. Protease inhibitors such as trypsin and chymotrypsin inhibitors have been demonstrated to reduce the incidence of certain cancers and demonstrate potent anti-inflammatory properties. Angiotensin I-converting enzyme (ACE) inhibitor has been associated with a reduction in hypertension. Therefore, legumes, including lentils, should be part of our daily food intake. However, high temperatures at the terminal stage is a major abiotic constraint leading to a reduction in lentil yield and seed quality. Thus, the selection of heat-tolerant genotypes is essential to identifying the potential for high yields with stable performance. To select lentil genotypes, an experiment was conducted with 60 genotypes including local landraces, advanced breeding lines, commercial varieties and exotic germplasm under stress and non-stress conditions from 2019 to 2020. This study was followed by a subset study involving screening based on a few physicochemical parameters and reproductive traits along with field performances. Different tolerance indices (i.e., stress susceptible index (SSI), relative heat index (RHI), tolerance (TOL), mean productivity (MP), stress tolerance index (STI), geometric mean productivity (GMP), yield index (YI), yield stability index (YSI), heat-resistance index (HRI), modified stress-tolerance index (MSTI), abiotic tolerance index (ATI) and stress susceptibility percentage (SSPI)) were used for the selection of the genotypes along with field performance. Biplot analysis was further performed for choosing the most suitable indices. Based on principal components analysis, the GMP, MP, RRI, STI, YI, YSI, ATI and MSTI indices were identified as the most reliable stress indicators, and these indicators might be used for distinguishing heat-tolerant genotypes. Based on the stress indices, the genotypes BLX 05002-3, BLX 10002-20, LRIL-21-1-1-1-1, LRIL-21-1-1-1-1-6 and BLX 09015 were selected as the most stable and heat-tolerant genotypes. In contrast, the genotypes LG 198, Bagura Local, BLX 0200-08-4, RL-12-178, Maitree, 91517 and BLX 11014-8 were selected as the most heat sensitive. Data also exhibited an average yield reduction of 59% due to heat stress on the lentils. Moreover, eight heat-tolerant (HT) genotypes (BLX 09015, PRECOZ, LRL-21-112-1-1-1-1-6, BLX 05002-3, LR-9-25, BLX 05002-6, BARI Masur-8 and RL-12-181), and two heat-susceptible (HS) genotypes (BLX 12009-6, and LG 198) were selected from the screened genotypes and subjected to further analysis by growing them in the following year under similar conditions to investigate the mechanisms associated with heat tolerance. Comparative studies on reproductive function and physiochemical traits revealed significantly higher pollen viability, proline accumulation, relative water content, chlorophyll concentration and a lower membrane stability index in HT genotypes under heat stress. Therefore, these heat-tolerant genotypes could be used as the parents in the hybridization program for achieving heat-tolerant transgressive segregation.
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Claims 8
Claim · model-written summary
Principal components analysis identified GMP, MP, RRI, STI, YI, YSI, ATI and MSTI as reliable heat stress indicators.
- Taxon
- lentil
Lens culinarise1 - Outcome
- most reliable stress indicatorse0
- Comparator
- GMP, MP, RRI, STI, YI, YSI, ATI and MSTI indicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Based on principal components analysis, the GMP, MP, RRI, STI, YI, YSI, ATI and MSTI indices were identified as the most reliable stress indicators”
e1“lentil genotypes”
Claim · model-written summary
Five genotypes were selected as the most stable and heat tolerant.
- Taxon
- lentilLens culinarise1
- Material
- BLX 05002-3, BLX 10002-20, LRIL-21-1-1-1-1, LRIL-21-1-1-1-1-6 and BLX 09015e0
- Outcome
- most stable and heat-tolerant genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the genotypes BLX 05002-3, BLX 10002-20, LRIL-21-1-1-1-1, LRIL-21-1-1-1-1-6 and BLX 09015 were selected as the most stable and heat-tolerant genotypes”
e1“lentil genotypes”
Claim · model-written summary
Seven genotypes were selected as the most heat sensitive.
- Taxon
- lentilLens culinarise1
- Material
- LG 198, Bagura Local, BLX 0200-08-4, RL-12-178, Maitree, 91517 and BLX 11014-8e0
- Outcome
- most heat sensitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the genotypes LG 198, Bagura Local, BLX 0200-08-4, RL-12-178, Maitree, 91517 and BLX 11014-8 were selected as the most heat sensitive”
e1“lentil genotypes”
Claim · model-written summary
Heat stress reduced average lentil yield by 59%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“average yield reduction of 59% due to heat stress on the lentils”
Claim · model-written summary
Eight heat-tolerant and two heat-susceptible genotypes were chosen for further analysis.
- Taxon
- lentilLens culinarise1
- Material
- BLX 09015, PRECOZ, LRL-21-112-1-1-1-1-6, BLX 05002-3, LR-9-25, BLX 05002-6, BARI Masur-8 and RL-12-181e0
- Outcome
- selected from the screened genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“eight heat-tolerant (HT) genotypes (BLX 09015, PRECOZ, LRL-21-112-1-1-1-1-6, BLX 05002-3, LR-9-25, BLX 05002-6, BARI Masur-8 and RL-12-181), and two heat-susceptible (HS) genotypes (BLX 12009-6, and LG 198) were selected from the screened genotypes”
e1“lentil genotypes”
Claim · model-written summary
Under heat stress, heat-tolerant genotypes had significantly higher pollen viability, proline, relative water content and chlorophyll than susceptible genotypes.
- Taxon
- lentilLens culinarise1
- Material
- HT genotypese0
- Treatment
- heat stresse0
- Outcome
- pollen viability, proline accumulation, relative water content, chlorophyll concentratione0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly higher pollen viability, proline accumulation, relative water content, chlorophyll concentration and a lower membrane stability index in HT genotypes under heat stress”
e1“lentil genotypes”
Claim · model-written summary
Under heat stress, heat-tolerant genotypes had a lower membrane stability index.
- Taxon
- lentilLens culinarise1
- Material
- HT genotypese0
- Treatment
- heat stresse0
- Outcome
- membrane stability indexe0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a lower membrane stability index in HT genotypes under heat stress”
e1“lentil genotypes”
Claim · model-written summary
The authors recommend heat tolerant genotypes as parents for heat tolerant transgressive segregation.
- Taxon
- lentilLens culinarise1
- Outcome
- parents in the hybridization program for achieving heat-tolerant transgressive segregatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these heat-tolerant genotypes could be used as the parents in the hybridization program for achieving heat-tolerant transgressive segregation”
e1“lentil genotypes”
The same questions in other papers
heat · yield · Lens culinaris (lentil)Positive and negative results
7 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
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