Genetic and biochemical analysis of bitterness in citrus
dc.contributor.advisor | Sidhu, Gurupkar Sigh | |
dc.contributor.author | Priyanka | |
dc.date.accessioned | 2021-09-09T06:52:58Z | |
dc.date.available | 2021-09-09T06:52:58Z | |
dc.date.issued | 2020 | |
dc.description.abstract | Citrus is the economically important fruit crop belongs to the family Rutaceae. Citrus fruit have abundance of health promoting substances which has various antimicrobial, antiseptic and anticancerous properties. The consumer’s acceptability of citrus juice gets lowered due to the problem of delayed bitterness. Previously identified LGT gene responsible for delayed bitterness was confirmed in the citrus germplasm which was present in all the studied citrus germplasm. The expression of this gene is highest during late fruit development stage and seeds exhibit the highest expression as compared to peel. Among three tissues studied, the highest gene expression was observed in the peel of grapefruit during late fruit development stage. Among studied genotypes, seeds of pummelo had the highest gene expression during late fruit development stage. The expression of this gene increases from early to late fruit developmental stage irrespective of the three tissues studied. The major delayed bitterness causing components are limonoids which occurs in glucoside and aglycone forms were estimated. Among all the commercial recommended scions, Pummelo had highest limonin aglycone content and glucoside content in leaves, peel and seeds. The flavonoid content was also highest in pummelo in all three tissues studied. The effect of citrus rootstocks on morphological, vegetative, physico-chemical, physiological traits and leaf nutrient status in three mandarins (Kinnow, Daisy and W. Murcott) was studied. The total phenolics, antioxidants, vitamin C content increased from early to late fruit development stage. The fruit and vegetative characters also followed the similar trend from early to late fruit development stage. The physiological characters decreased from early to late fruit development stage in all three mandarins irrespective of the rootstock. Leaf nutrients status of three mandarins show variability on different rootstocks studied. | en_US |
dc.identifier.citation | Priyanka (2020). Genetic and biochemical analysis of bitterness in citrus (Unpublished Ph.D. Dissertation). Punjab Agricultural University, Ludhiana, Punjab, India. | en_US |
dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810175555 | |
dc.keywords | Citrus, delayed bitterness, rootstocks, scion, glucoside, aglycone | en_US |
dc.language.iso | English | en_US |
dc.pages | 163 | en_US |
dc.publisher | Punjab Agricultural University, Ludhiana | en_US |
dc.research.problem | Genetic and biochemical analysis of bitterness in citrus | en_US |
dc.sub | Agricultural Biotechnology | en_US |
dc.theme | Genetic and biochemical analysis of bitterness in citrus | en_US |
dc.these.type | Ph.D | en_US |
dc.title | Genetic and biochemical analysis of bitterness in citrus | en_US |
dc.type | Thesis | en_US |
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