Heritability Paterns of Some Agro-Botanical Characters Related to Yield and Drought Tolerance in Two Landraces of Rice

IF 0.4 4区生物学 Q4 PLANT SCIENCES GAYANA BOTANICA Pub Date : 2020-12-01 DOI:10.2478/botlit-2020-0016

Olubukola Grace Abraham, C. C. Nwokeocha, J. Faluyi

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引用次数: 1

Abstract

Abstract Two landraces of rice, AWGUII-04 and IJ-124, were characterised and assessed for phenotypic variability, heritability, genetic advance and modes of inheritance of some primary yield and drought-tolerance traits. The target traits for yield were a percentage of filled spikelets, plant form, tillering, and for drought tolerance, leaf rolling, ratooning and maturity. This study was carried out to help both breeders and farmers make a wise choice when carrying out hybridisation and on the field. Hybridisation produced three F1 hybrids that were advanced to F2 generation. Quantitative and qualitative vegetative and reproductive data were taken from each F2 population. The results obtained showed high heritability (62–100%) in all the thirty-eight vegetative and reproductive traits. The genetic advance was high (> 20%) in all the target traits except for leaf rolling. The traits segregated in the following ratio: plant growth form – 9:6:1; the percentage of filled spikelets – 13:3; ratooning – 3:1; maturity – 15:1; the number of tillers – 15:1 and leaf rolling – 15:1. The high heritability of the above traits makes them highly dependable for rice crop improvement.

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两个地方品种水稻产量和耐旱性相关农学性状的遗传规律

摘要对2个水稻地方品种AWGUII-04和IJ-124的主要产量和耐旱性状进行了表型变异、遗传力、遗传先进性和遗传模式分析。产量的目标性状为实穗百分率、植株形态、分蘖、耐旱性、叶片滚动、再生和成熟度。本研究旨在帮助育种者和农民在杂交和田间做出明智的选择。杂交产生了3个F1杂种，这些杂种进入了F2代。对每个F2群体进行了定量和定性的营养和生殖资料采集。结果表明，38个营养性状和生殖性状的遗传率均为62 ~ 100%。除卷叶性状外，其余性状的遗传进步均较高，达20%。性状的分离比例为:植物生长形态:9:6:1;灌浆小穗百分率- 13:3;再生- 3:1;成熟度:15:1;分蘖数为15:1，卷叶数为15:1。上述性状的高遗传力使其在水稻作物改良中具有很高的可靠性。

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来源期刊

GAYANA BOTANICA Agricultural and Biological Sciences-Plant Science

CiteScore

0.70

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： The journal welcomes works carried out by scientists of all nationalities, and may be written in either English or Spanish. The journal receives works in systematic, taxonomy, floristic, ecology, physiology, morphology, development, conservation, cytology and phytochemical botany.