GENETIC ARCHITECTURE OF NEW PLANT TYPE RICE (ORYZA SATIVA L.) LINES BASED ON A 12-YEARS MULTI-EXPERIMENT
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Published:2023-08-31
Issue:4
Volume:55
Page:1025-1037
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ISSN:1029-7073
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Container-title:SABRAO Journal of Breeding and Genetics
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language:
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Short-container-title:SABRAOJBG
Author:
ASWIDINNOOR H.,LISTIYANTO R.,SUWARNO W.B.
Abstract
New plant-type (NPT) rice can increase grain yield globally. Although many studies have shown the association between harvest and yield-related traits in rice, it remains obscure in the case of NPT rice. This study aimed to elucidate the relationship between agronomic and yield features in new plant-type rice based on a 12-years multi-experiment. A large dataset of 704 NPT rice lines of various generations (F4 to F10), derived from 24 different populations, underwent study. The analysis of variance showed a highly significant population effect (P < 0.01) on all traits studied. The NPT rice populations had groupings into four clusters, with a highly substantial cluster effect (P < 0.01) on the number of total tillers (NTT), number of total grains (NTG), number of filled grains (NFG), and thousand-grain weight (TGW). Standard best NPT lines from each experiment achieved an average of 1.67 t ha-1 or 26% higher yield than the Ciherang variety. Determining the yield advantage of NPT lines was by higher plant height (PH) (r = 0.37), panicle length (PL) (r = 0.15), NTG (r = 0.28), NFG (r = 0.28), TGW (r = 0.10), and lower days to harvest (DTH) (r = -0.10). The principal component analysis biplot revealed that NFG could better serve as a selection characteristic for enhancing grain yield in developing NPT rice adapted to irrigated tropical ecosystems.
Publisher
Society for the Advancement of Breeding Research in Asia and Oceania
Subject
Horticulture,Agronomy and Crop Science,Genetics,Animal Science and Zoology,Biotechnology