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Accueil du site → Doctorat → Royaume-Uni → 2020 → The morpho-physiological effect of drought and drought QTL analysis on Bambara Groundnut (Vigna Subterranean (L) Verdc)

University of Nottingham (2020)

The morpho-physiological effect of drought and drought QTL analysis on Bambara Groundnut (Vigna Subterranean (L) Verdc)

Krishnamoorthy, Mahaletchumy

Titre : The morpho-physiological effect of drought and drought QTL analysis on Bambara Groundnut (Vigna Subterranean (L) Verdc)

Auteur : Krishnamoorthy, Mahaletchumy

Université de soutenance : University of Nottingham

Grade : Doctor of Philosophy (PhD) 2020

Résumé partiel
Global warming threatens global food production with rising temperatures and increasing periods of drought. Bambara groundnut with its relatively high percentage of seed protein and its ability to produce some yield where other crops fail seems to fit the characteristics of an alternative crop for the future. Although Bambara groundnut is said to be drought tolerant and is more resilient than many other crops, few studies have been carried out on this crop in comparison to other crops, especially in terms of drought tolerance. The aim of the study is to evaluate the different genotypes and a segregating population under drought and perform QTL analysis of agronomic and drought related traits for the mapped populations.

A field experiment was conducted at Crop for the Future Research Centre (Field Research Centre) in Malaysia from January 2016 to May 2016 to evaluate two genotypes from dry (S19-3 and DipC) and two from wet (Uniswa Red and Gresik) countries. The plants were harvested starting from 120 DAS due to rain daily starting from 110 DAS which could damage the pods. In this experiment, S19-3 recorded the highest seed yield (Irrigated=10.26g/plant, Rainfed=10.03g/plant) in both treatments as it has completed its lifecycle (>100 days) whereas the other genotypes were still in pod filling stage. Under water stressed conditions, the crops complete their lifecycle earlier which may explain the higher number of seeds in DipC and Uniswa Red under rainfed conditions (DipC : Irrigated= 3.07g/plant, Rainfed= 5.30g/plant ; Uniswa Red : Irrigated= 2.89g/plant, Rainfed= 7.53g/plant). The result from this experiment gives an insight into the suitable genotypes to be considered when planting the crop in Malaysia under rainfed conditions

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Page publiée le 25 janvier 2023