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Accueil du site → Doctorat → Inde → 1980-1989 → Fruit set in tomato (Lycopersicon esculentum Mill.) under prevalling summer temperature and drought conditions in semi-arid region of Haryana

Chaudhary Charan Singh Haryana Agricultural University (1988)

Fruit set in tomato (Lycopersicon esculentum Mill.) under prevalling summer temperature and drought conditions in semi-arid region of Haryana

Rana, Mahesh Kumar

Titre : Fruit set in tomato (Lycopersicon esculentum Mill.) under prevalling summer temperature and drought conditions in semi-arid region of Haryana

Auteur : Rana, Mahesh Kumar

Université de soutenance : Chaudhary Charan Singh Haryana Agricultural University

Grade : Doctor of Philosophy (PhD) 1988

Résumé présenté dans KrishiPrabha (Indian Agricultural Doctoral Dissertations Repository)

A study was conducted with a view to find out, the sources of tolerance/resistance, and the causes of unfruitfulness, in tomato under prevailing summer temperature and water deficit conditions at Hisar. For this purpose the experiments on varietal screening and on morphophysio­logical studies were conducted separately. The experimental fields were sandy loam in texture and were canal integrated, No farm yard manure and fertilizer was applied in all the experiments. Irrigations were ap­plied according to the requirement of the crop, whereas in water stress experiment, only two irrigations, were applied i.e. first at the time of transplanting and second one week after transplanting. About 150 tomato lines including wild species land races and cultivated varieties were screened under field conditions. The various experiments were laid out in a randomised block design with three replications.

The genotypes Pondrosa, 84±58, L. cheesmanii, EC 130042, EC 162935, HS 102 and Pusa Sel‑2 exhibited reduced flower drop, higher fruit setting rate, higher number of fruits/truss, higher number of fruits/ plant, higher yield/plant, less stigma exsertion, absence of thick and fasciated stigma, absence of splitting of antheridial cone, absence of anther tip burning, higher anther dehiscence, higher pollen viability and higher pollen germination under prevailing summer temperature condi­tions. These genotypes showed resistance/tolerance to high tempera­ture. In water stress experiment, genotypes L. pimpinellifolium, EC 130042, rin 84±58, Sel‑28 and L. cheesmanii ‑required more number of days to flower cessation and to wilting ; had longer root length ; higher root, leaf, stem and whole plant moisture content ; had more wax and hairs as their leaves and stem ; had higher relative water content ; less water saturation deficit ; less canopy temperature ; higher less ‑ve) osmotic potential and their growth and fruit set remained continue with higher rate at the time of water stress. These genotypes showed resistance/ tolerance to water deficit.

Mots clés : Tomato, drought, semi-arid, Haryana

KrishiPrabha (Indian Agricultural Doctoral Dissertations Repository)

Page publiée le 28 janvier 2015, mise à jour le 1er février 2021