Heterosis for seed and seedling traits in papaya

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Published

2022-09-07

Keywords:

Carica papaya L., average heterosis, germination, heterobeltiosis.
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Vol. 79 No. 02 (2022): Indian Journal of Horticulture

Section

Research Articles

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Copyright (c) 2022 Indian J. Hortic

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This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors

  • Preeti Singh Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi -110 012
  • Jai Prakash Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi -110 012
  • Singh Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi -110 012
  • A. K. Goswami Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi -110 012
  • Zakir Hussain Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi -110 012

Abstract

The current study aimed to explore the heterosis expressed in the seed and seedlings of 36 papaya hybrids originating from the 6 inbred lines. The results revealed that heterosis manifested in the papaya's seed and seedling stage. The cross combinations, P-9-5 × P-7-2, P-9-12 × PN and PN × P-9-5 exhibited positive average heterosis and heterobeltiosis for physical seed traits. The genotypes, P-9-5, P-9-12, P-9-5 × P-9-12 and P-9-12 × P-9-5 were observed with positive mid-parent heterosis and heterobeltiosis for the seedling traits. The hybrid, P-7-9 × PN and PS3 × P-7-9, showed positive average heterosis (5.89% and 9.91%) and heterobeltiosis (3.41% and 2.09%) for germination percentage, respectively. Whereas in case of seedling length and weight (fresh and dry), the hybrid combination, P-9-5 × P-9-12 exhibited positive heterosis. The heterosis effect estimate helped us to identify the superior performing hybrids like PN × P-7-2, PN × P-9-5, P-7-2 × PN, P-7-2 × P-7-9, P-7-9 × P-9-5, P-9-5 × P-7-2, P-9-5 × P-9-12, P-9-12 × PN, P-9-12 × P-7-2, P-9-12 × P-9-5and PS3 × P-7-9, in the initial stage of seedling development.

How to Cite

Singh, P., Prakash, J., Singh, S. K., Goswami, A. K., & Hussain, Z. (2022). Heterosis for seed and seedling traits in papaya. Indian Journal of Horticulture, 79(02), 127–135. Retrieved from https://www.journal.iahs.org.in/index.php/ijh/article/view/1

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Indian Journal of Horticulture, June 2022

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