Scholarlink

<p>Tomato is&#xa0;important crop in view of their nutritional values (vitamins A and C), antioxidants property (lycopene), and culinary applications.&#xa0;Tomatoes exhibit rich diversity and potential for the development of new high-yielder and high-quality hybrids/varieties through essential techniques such as heterosis, combining ability and genetic behavior.&#xa0;An investigation was undertaken using the design of diallel cross analysis in 45 tomato genotypes (9 parents and 36 hybrids), to assess 20 quantitative (morpho-physiological and fruit yield) and quality traits (biochemicals characteristics and shelf life of fruit). The parental line ‘Pusa Sadabahar (PS)’, ‘Suncherry (SC)’, ‘Hissar Anmol (HA)’, ‘Superbug (SB)’ showed the strong general combining ability (GCA) effects for various economic traits, and the crosses ‘DT-10 × SC’, ‘SC × SB’, ‘PC × Roma’, ‘SC × PS’, ‘SB × PS’, ‘RG × SC’, ‘PC × IIHR-2201’, ‘Roma × HA’, ‘PC × SC’ and ‘Roma × SC’ exhibited significant and desired specific combining ability (SCA) effects and higher heterosis for most of the examined traits <i>i.e.,</i> days to 50% flowering, days to fruit setting, percent fruit set, number of primary branches, total fruit per plant, and yield/ plant, TSS, acidity, ascorbic acid, lycopene and shelf life. With dominant genes affecting most traits and the narrow-sense heritability over 60%, showing strong genetic influence, both forms of additive and dominance gene effects were significant. The average degree of dominance (H₁/D)½) indicated that seven traits (days to 50% flowering, plant height, number of primary branches, number of seeds, T.S.S., lycopene, and T.S.S./acid ratio) were strongly dominant, twelve traits had somewhat more dominance than anticipated, and the number of locules showed partial dominance in nature. The ‘KD/KR’ ratio was greater than the unity of ‘1’ for some traits signalling dominant gene action for certain traits. Meanwhile, the value of ‘K (h<sup>2</sup>/H<sub>2</sub>)’ was less than the unity of ‘1’ indicated additive genetic control in most traits. This study offers useful information regarding the genetics of important quantitative and quality traits in tomato. The genetic material examined in this study can be used in the future breeding programmes by the introgression and hybridization techniques for developing new superior tomato hybrids/varieties with longer shelf lives and higher yields. This information and genetic materials are useful to the tomato breeder’s, and can be utilized in their research.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Hybrid performance, combining ability and inheritance of quantitative and quality traits including shelf life in tomato (Solanum lycopersicum L.)

  • 期刊论文

  • 发表日期：

    2025年8月4日

查看全文
  • Rashmi Singh,
  • Nagendra Rai,
  • Prashant Kumar,
  • Dhananjay K. Upadhyay,
  • Neeraj Dwivedi,
  • Ramesh K. Singh

摘要

Tomato is important crop in view of their nutritional values (vitamins A and C), antioxidants property (lycopene), and culinary applications. Tomatoes exhibit rich diversity and potential for the development of new high-yielder and high-quality hybrids/varieties through essential techniques such as heterosis, combining ability and genetic behavior. An investigation was undertaken using the design of diallel cross analysis in 45 tomato genotypes (9 parents and 36 hybrids), to assess 20 quantitative (morpho-physiological and fruit yield) and quality traits (biochemicals characteristics and shelf life of fruit). The parental line ‘Pusa Sadabahar (PS)’, ‘Suncherry (SC)’, ‘Hissar Anmol (HA)’, ‘Superbug (SB)’ showed the strong general combining ability (GCA) effects for various economic traits, and the crosses ‘DT-10 × SC’, ‘SC × SB’, ‘PC × Roma’, ‘SC × PS’, ‘SB × PS’, ‘RG × SC’, ‘PC × IIHR-2201’, ‘Roma × HA’, ‘PC × SC’ and ‘Roma × SC’ exhibited significant and desired specific combining ability (SCA) effects and higher heterosis for most of the examined traits i.e., days to 50% flowering, days to fruit setting, percent fruit set, number of primary branches, total fruit per plant, and yield/ plant, TSS, acidity, ascorbic acid, lycopene and shelf life. With dominant genes affecting most traits and the narrow-sense heritability over 60%, showing strong genetic influence, both forms of additive and dominance gene effects were significant. The average degree of dominance (H₁/D)½) indicated that seven traits (days to 50% flowering, plant height, number of primary branches, number of seeds, T.S.S., lycopene, and T.S.S./acid ratio) were strongly dominant, twelve traits had somewhat more dominance than anticipated, and the number of locules showed partial dominance in nature. The ‘KD/KR’ ratio was greater than the unity of ‘1’ for some traits signalling dominant gene action for certain traits. Meanwhile, the value of ‘K (h2/H2)’ was less than the unity of ‘1’ indicated additive genetic control in most traits. This study offers useful information regarding the genetics of important quantitative and quality traits in tomato. The genetic material examined in this study can be used in the future breeding programmes by the introgression and hybridization techniques for developing new superior tomato hybrids/varieties with longer shelf lives and higher yields. This information and genetic materials are useful to the tomato breeder’s, and can be utilized in their research.