Selection of heat tolerant donor lines in indian mustard (Brassica Juncea L.)

IF 0.4 4区 生物学 Q4 PLANT SCIENCES
Jasneet Kaur, Surinder K Sandhu, I. Rialch, Manpreet Singh, Karanveer Kaur, L. Pal
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引用次数: 0

Abstract

Heat stress during the post anthesis (seed filling) stage negatively influences the movement of photosynthates to the developing sinks and, thus lowering the seed yield in Indian mustard [Brassica juncea (L.) Czern & Coss].  The present studywas conducted with the objective to unravel the variability for terminal heat stress (THS) in a fixed diversitygenetic stock of 500 lines of Indian mustard. Germplasm stock exhibited huge variability for seed yield and its contributing traits with variable levels of yield reduction under late sown conditions. The per se yield based computed heat stress susceptibility index (HSI) ranged from 32.3 (highly THS susceptible) to -1.15 (THS tolerant). Based on yield reduction due to THS, 500 test genotypes were grouped into 10 classes and genotypes from each class wererandomly takento constitute a diverse panel of 96 lines. This panel was evaluated under THS by raising crop underpoly-tunnels during reproductive phase along with same set of 96 genotypes raised under normal field conditions (served as control). Based on agronomic advantage and HSI for economic traits, 23 heat tolerant donor lines were selected for utilization in commercial breeding programme.  Bangladesh J. Bot. 52(4): 1007-1013, 2023 (December)
印度芥菜(Brassica Juncea L.)耐热供体品系的选育
花后(种子灌浆)阶段的热胁迫会对光合产物向发育中的汇的移动产生负面影响,从而降低印度芥菜[Brassica juncea (L.) Czern & Coss]的种子产量。 本研究旨在揭示由 500 个印度芥菜品系组成的固定多样性遗传种群中顶端热胁迫(THS)的变异性。在晚播条件下,种质群在种子产量及其相关性状方面表现出巨大的变异性和不同程度的减产。根据计算得出的热胁迫易感指数(HSI),单株产量从 32.3(高度热胁迫易感)到-1.15(热胁迫耐受)不等。根据热胁迫导致的减产情况,500 个测试基因型被分为 10 个等级,每个等级中的基因型被随机抽取,以组成一个由 96 个品系组成的多样化小组。在生育期,通过在聚能隧道中种植作物,对该小组进行了 THS 评估,同时还对在正常田间条件下种植的同一组 96 个基因型进行了评估(作为对照)。根据农艺优势和经济性状的 HSI,选出 23 个耐热供体品系,用于商业育种计划。 孟加拉国植物学杂志》(Bangladesh J. Bot.52(4):1007-1013,2023 年(12 月)
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来源期刊
Bangladesh Journal of Botany
Bangladesh Journal of Botany 生物-植物科学
CiteScore
0.80
自引率
0.00%
发文量
77
审稿时长
9 months
期刊介绍: Bangladesh in situated on the north of Bay of Bengal. Climatically it is a humid subtropical country. Most of the land is deltaic plain of two great rivers, the Ganges and the Bhrammaputra and it tributaries. The country has rich diversity of plants. Main crops cultivated are Rice, Jute, Wheat, Maize, Sugarcane, Mustard and different kinds of Lentils. There are a good number of Public and Private Universities and Plant Research Establishments. Bangladesh Journal of Botany is the official organ of the Bangladesh Botanical Society established in 1972. Since 1972 Bangladesh Journal of Botany is being published regularly. Two issues of the Journal are published, one in June and another in December. Scientific papers (Full paper and short communication) on any field of Plant Sciences from anywhere in the World are considered for publication in Bangladesh Journal of Botany.
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