Quality assessment in association with yield attributes contributing improved yield in onion (Allium cepa L.).
Quality assessment in association with yield attributes contributing improved yield in onion (Allium cepa L.).
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DOI：
10.22271/09746315.2019.v15.i3.1245
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发表时间：
2019-01-01
期刊：
影响因子：
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通讯作者：
Majumder, A.
中科院分区：
文献类型：
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作者：
Bal, S.;Maity, T. K.;Majumder, A.
在2017-18年和2018-19年冬季，在印度西孟加拉邦Bidhan Chandra Krishi Viswavidyalaya(农业大学)的C区农场对23个洋葱基因型/杂交种进行了评估，目的是确定14个不同性状对鳞茎产量的相对贡献。结果表明，鳞茎总产量与极径、成熟期天数、总糖和酚类物质在表型和基因水平上均呈极显著正相关。而与60d株高、丙酮酸、紫斑病严重程度在基因和表型水平上均呈负相关。通径系数分析表明，对小区产量的直接正效应最大的是10个鳞茎的平均重量，其次是鳞片数、60d时的叶片数、总糖率、干物率和极径。直接负效应最大的是赤道直径，其次是60日龄株高、维生素C、紫斑病严重程度、苯酚、丙酮酸、可溶性固形物。因此，育种家在进行洋葱良种选育时，应根据洋葱极径大、成熟天数多、总糖率高、酚含量高、平均十球重高、鳞片数多、60日龄叶片数多、极径大、总糖和干物质含量高的特点进行选择。
Twenty-three genotypes/hybrids of onion were evaluated at 'C' block farm of Bidhan Chandra Krishi Viswavidyalaya (Agricultural University), West Bengal, India during the Rabi (winter) seasons of 2017-18 and 2018-19 with an objective of determining the relative contribution of fourteen different characters on bulb yield. The results of this experiment revealed that total bulb yield was found to be positive and significantly correlated with polar diameter, days to maturity, total sugar and phenol both at genotypic and phenotypic level. While, negative association was observed with plant height at 60 DAT (Days after transplanting), pyruvic acid, severity of purple blotch disease both at genotypic and phenotypic level. Path coefficient analysis revealed that maximum positive direct effect on yield per plot was exhibited by average weight of ten bulbs followed by number of scales per bulb, number of leaves at 60 DAT, total sugar percentage, dry matter percentage, and polar diameter. The maximum negative direct effect was exhibited by equatorial diameter followed by plant height at 60 DAT, vitamin C, severity of purple blotch disease, phenol, pyruvic acid, total soluble solids. So a breeder while conducting improvement in onion should undergo selection based on longer polar diameter, more number of days to maturity, higher total sugar percentage and phenol, high average weight of ten bulbs, more number of scales per bulb, more number of leaves at 60 DAT, high polar diameter, high total sugar and dry matter percentage.