Effect of terminal heat stress on yield and yield components of bread wheat genotypes

Gupta, Mamta; Chawla, Veena; Dhanda, S. S.; Saharan, R. P.; Munjal, Renu; Goel, Pankaj

doi:10.5958/2348-7542.2015.00006.6

Cited by 3 publications

(2 citation statements)

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“…In the present investigation, transpiration rate increased significantly at 10 DAA under late sown conditions. Gupta et al (2015) reported highest rate of transpiration in tolerant genotypes, which showed similar trends with the results of this attribute in the present study, as heat tolerant parent WH1021 has high rate of transpiration during late sown than heat sensitive parent WH711. It was inferred that enhanced transpiration might help tolerant genotype to maintain higher rate of photosynthesis through cooling effect under heat stress.…”

Section: Statistical and Qtl Analysis: Analysis Of Variance Andsupporting

confidence: 90%

QTL mapping for morphological and physiological traits in RILs of spring wheat population of WH1021 × WH711

Sangwan¹,

Munjal²,

Ram³

et al. 2019

JEB

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To identify the quantitative trait loci (QTLs) associated with various morphological and physiological traits. A recombinant inbred line (RIL) population of wheat (Triticum aestivum L.) derived from cross of heat tolerant parent WH1021 with heat sensitive parent WH711 was used. For creation of heat stress delay in sowing (four weeks) was done in late sown from timely sown. Days to heading, days to maturity, plant height along with physiological traits viz. photosynthetic rate, transpiration rate, intrinsic water use efficiency (iWUE) and normalized difference vegetative index (NDVI) were recorded in both timely and late sown conditions over two years. A linkage map consisting of 22 SSR was prepared covering eleven chromosome of wheat. Using the software WinQTL cartographer version 2.5, significant genomic regions associated with heat tolerance were observed on 2A, 2D, 4A and 5A chromosomes with composite interval mapping. QTLs for photosynthetic rate were found consistently for both years on chromosome 2D. In present study, significant variation was reported for days to heading and its QTLs were identified on chromosome 2A and 2D. The QTLs obtained for physiological and morphological traits in wheat can be used for marker-assisted selection for heat tolerance in wheat.

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Section: Statistical and Qtl Analysis: Analysis Of Variance Andsupporting

confidence: 90%

QTL mapping for morphological and physiological traits in RILs of spring wheat population of WH1021 × WH711

Sangwan¹,

Munjal²,

Ram³

et al. 2019

JEB

View full text Add to dashboard Cite

show abstract

“…According to Singh et al (2017) under elevated temperature photosynthetic rates declined rapidly during grain filling period and the decline was significantly lower than ambient condition. Gupta et al (2015) found that photosynthesis and stomatal conductance decreased significantly under late sown condition, heat tolerant genotype maintained higher rate of photosynthesis and stomatal conductance after anthesis under late sown condition. Transpiration rate is an important parameter, which is directly linked with temperature sensitivity vis a vis water availability for a plant.…”

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confidence: 87%