Categorization of Diverse Wheat Genotypes for Zinc Efficiency Based on Higher Yield and Uptake Efficiency

The root system architectures (RSAs) largely decide the phosphorus use efficiency (PUE) of plants by influencing the phosphorus uptake. Very limited information is available on wheat’s RSAs and their deciding factors affecting phosphorus uptake efficiency (PupE) due to difficulties in adopting scoring values used for evaluating root traits. Based on our earlier research experience on nitrogen uptake efficiency screening under, hydroponics and soil-filled pot conditions, a comprehensive study on 182 Indian bread wheat genotypes was carried out under hydroponics with limited P (LP) and non-limiting P (NLP) conditions. The findings revealed a significant genetic variation, root traits correlation, and moderate to high heritability for RSAs traits namely primary root length (PRL), total root length (TRL), total root surface area (TSA), root average diameter (RAD), total root volume (TRV), total root tips (TRT) and total root forks (TRF). In LP, the expressions of TRL, TRV, TSA, TRT and TRF were enhanced while PRL and RAD were diminished. An almost similar pattern of correlations among the RSAs was also observed in both conditions except for RAD. RAD exhibited significant negative correlations with PRL, TRL, TSA, TRT and TRF under LP (r = -0.45, r = -0.35, r = -0.16, r = -0.30, and r = -0.28 respectively). The subclass of TRL, TSA, TRV and TRT representing the 0–0.5 mm diameter had a higher root distribution percentage in LP than NLP. Comparatively wide range of H’ value i.e. 0.43 to 0.97 in LP than NLP indicates that expression pattern of these traits are highly influenced by the level of P. In which, RAD (0.43) expression was reduced in LP, and expressions of TRF (0.91) and TSA (0.97) were significantly enhanced. The principal component analysis for grouping of traits and genotypes over LP and NLP revealed a high PC1 score indicating the presence of non-crossover interactions. Based on the comprehensive P response index value (CPRI value), the top five highly P efficient wheat genotypes namely BW 181, BW 103, BW 104, BW 143 and BW 66, were identified. Considering the future need for developing resource-efficient wheat varieties, these genotypes would serve as valuable genetic sources for improving P efficiency in wheat cultivars. This set of genotypes would also help in understanding the genetic architecture of a complex trait like P use efficiency.

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Phytosiderophore release in bread and durum wheat genotypes differing in zinc efficiency

Plant and Soil ◽

10.1007/bf00015301 ◽

1996 ◽

Vol 180 (2) ◽

pp. 183-189 ◽

Cited By ~ 103

Author(s):

I. Cakmak ◽

N. Sari ◽

H. Marschner ◽

H. Ekiz ◽

M. Kalayci ◽

...

Keyword(s):

Durum Wheat ◽

Zinc Efficiency ◽

Wheat Genotypes

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Root morphology of wheat genotypes differing in zinc efficiency

Journal of Plant Nutrition ◽

10.1080/01904169509365098 ◽

1995 ◽

Vol 18 (12) ◽

pp. 2761-2773 ◽

Cited By ~ 75

Author(s):

Bei Dong ◽

Zdenko Rengel ◽

Robin D. Graham

Keyword(s):

Root Morphology ◽

Zinc Efficiency ◽

Wheat Genotypes

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Dry matter production and distribution of zinc in bread and durum wheat genotypes differing in zinc efficiency

Plant and Soil ◽

10.1007/bf00015300 ◽

1996 ◽

Vol 180 (2) ◽

pp. 173-181 ◽

Cited By ~ 57

Author(s):

I. Cakmak ◽

N. Sari ◽

H. Marschner ◽

M. Kalayci ◽

A. Yilmaz ◽

...

Keyword(s):

Durum Wheat ◽

Dry Matter ◽

Dry Matter Production ◽

Zinc Efficiency ◽

Wheat Genotypes ◽

Matter Production ◽

Production And Distribution

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Classification of Pigeonpea (Cajanus cajan (L.) Millsp.) Genotypes for Zinc Efficiency

Plants ◽

10.3390/plants9080952 ◽

2020 ◽

Vol 9 (8) ◽

pp. 952

Author(s):

Sanjib Kumar Behera ◽

Arvind Kumar Shukla ◽

Pankaj Kumar Tiwari ◽

Ajay Tripathi ◽

Pooja Singh ◽

...

Keyword(s):

Seed Yield ◽

Cajanus Cajan ◽

Field Experiments ◽

Agricultural Research ◽

Efficiency Index ◽

Fertilizer Application ◽

Zinc Efficiency ◽

Uptake Efficiency ◽

Zn Uptake ◽

Soil Zn

Pigeonpea (Cajanus cajan (L.) Millsp.) is grown globally for its protein-rich seed. However, low availability of soil zinc (Zn) adversely affects the seed yield of pigeonpea. The present study was therefore conducted to assess the Zn efficiency of pigeonpea genotypes based on seed yield and seed Zn uptake efficiency. Field experiments were conducted at the Indian Council of Agricultural Research–Indian Institute of Soil Science, Bhopal, India with twenty different pigeonpea genotypes and two levels of Zn application under a split-plot design. The two levels of Zn were low (without application of Zn fertilizer) and high (with application of 20 kg Zn ha−1 (as ZnSO4∙7H2O) as basal soil application, in conjunction with three foliar sprays of 0.50% (w/v) ZnSO4∙7H2O aqueous solution) (with 0.25% lime as neutralizing agent) at flowering, pod formation, and pod filling stages). Application of Zn improved plant height, branches plant−1, pods plant−1, seeds pod−1, and 100 seed weight of pigeonpea genotypes differently. The mean seed yield, seed Zn concentration, and seed Zn uptake of the genotypes increased from 1.71 to 2.12 t ha−1, 32.4 to 43.0 mg kg−1, and 54.9 to 90.6 g ha−1, respectively, with application of Zn. The seed yield efficiency index (SYEI) and Zn uptake efficiency index (ZUEI) of pigeonpea genotypes varied from 67.0 to 92.5 and from 47.0 to 69.9, respectively. Based on SYEI and ZUEI, the genotypes were classified as efficient and responsive (Virsa Arhar-1, GT-1, GT-101, SKNP 05-05, BDN-2, AAUT 2007-04, BSMR 853, T 15-15, DT 23, Pusa 9), efficient and non-responsive (ICPL 87119, PKV Trombay), inefficient and responsive (AKT 8811, Hisar Paras), and inefficient and non-responsive (AAUT 2007-10, JKM 7, Hisar Manak, C 11, Hisar HO2-60, GAUT 93-17). The efficient and responsive genotypes are the most useful as they yield well under low soil Zn conditions and also respond to Zn fertilizer application. The inefficient and responsive genotypes could be utilized for plant breeding programs by plant breeders for identification and utilization of responsive traits.

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