GENETIC VARIABILITY, HERITABILITY AND GENETIC ADVANCE FOR YIELD AND RELATING TRAITS IN RICE (ORYZA SATIVA L.) GENOTYPES INTRODUCED FROM IRRI IN MEKONG DELTA

Tạ Hồng Lĩnh; Trần Đức Trung; Ngô Đức Thể; Nguyễn Thúy Kiều Tiên; Bùi Quang Đãng

GENETIC VARIABILITY, HERITABILITY AND GENETIC ADVANCE FOR YIELD AND RELATING TRAITS IN RICE (ORYZA SATIVA L.) GENOTYPES INTRODUCED FROM IRRI IN MEKONG DELTA

About this article

Received: 27/11/19 Revised: 15/01/20 Published: 16/01/20

Authors

1. Ta Hong Linh, Vietnam Academy of Agricultural Sciences
2. Tran Duc Trung , Vietnam Academy of Agricultural Sciences
3. Ngo Duc The, Plant Resource Center
4. Nguyen Thuy Kieu Tien, Cuu Long Rice Research Institute
5. Bui Quang Dang, Vietnam Academy of Agricultural Sciences

Abstract

Two-hundred and fifty-two inbred rice genotypes introduced from IRRI were evaluated under standard field-evaluation condition in Mekong Delta. These genotypes were assessed for 08 quantitative traits and 04 qualitative traits concerning yield and other relating characteristics. The morphological data were subjected to Pearson correlation matrix, Principal Component Analysis and cluster analysis to determine the level of diversity and degree of association existing between evaluated traits. Yield and most relating traits exhibited higher GCV and PCV compared to growth parameters. Genetic advance as percent of mean ranged from 5.57% for spike length to over 100% for qualitative traits. High heritability estimation were recorded for maturity and qualitative traits (1.00) following by plant height, estimated yield (0.76) and grain filling rate (0.73). The PCA results suggests that grain density and estimated grain yield were the principal discriminatory traits for evaluated IRRI rice genotypes, which indicated that selection in favour of these traits might be effective in this population and environment.

Keywords

Agronomy; rice; IRRI; genetic parameters for yield; GCV; PCV; principal component analysis PCA.

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