Path Analyses of Yield and Yield‐Related Traits of Fifteen Diverse Rice Genotypes

Samonte, Stanley Omar P. B.; Wilson, L. T.; McClung, Anna M.

doi:10.2135/cropsci1998.0011183x003800050004x

Cited by 140 publications

(139 citation statements)

References 13 publications

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“…Guna mengetahui pengaruh langsung dan tidak langsung genotipik dan fenotipik terhadap kemajuan seleksi dilakukan analisis sidik lintas dengan formulasi sebagai berikut (Samonte et al, 1998) R1y = P1y + r12P2y + r13P3y +…+ r1nPny R2y = r12P1y +P2y + r23P3y +…+ r2nPny Rny = r1nP1y + r2nP2y + r3nP3y +…+ Pny R1y = Koefisien korelasi sederhana secara genotipik dan fenotipik dari sifat ke-1 dengan sifat Y (hasil) R2y = Koefisien korelasi sederhana secara genotipik dan fenotipik dari sifat ke-2 dengan sifat Y (hasil) P1y = Pengaruh langsung secara genotipik dan fenotipik dari sifat ke-1 terhadap Y (hasil) Pny = Pengaruh langsung secara genotipik dan fenotipik dari sifat ke-n terhadap Y (hasil) r1nPny = Pengaruh tidak langsung secara genotipik dan fenotipik dari sifat ke-1 terhadap Y (hasil)…”

Section: Bahan Dan Metodeunclassified

Analisis Ragam Genetik, Heritabilitas, Dan Sidik Lintas Karakter Agronomik Jagung Hibrida Silang Tunggal

Priyanto

Azrai

Syakir

2018

Informatika Pertanian

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ABSTRAKKeberhasilan seleksi tanaman melalui pemuliaan ditentukan oleh keragaman genetik, nilai heritabilitas, korelasi antara karakter agronomi dan hasil panen. Penelitian bertujuan untuk mengetahui keragaman genetik, heritabilitas, dan pengaruh karakter agronomi terhadap hasil jagung hibrida. Percobaan dilaksanakan pada Februari-Mei 2016 di Kabupaten Grobogan, Jawa Tengah. Perlakuan terdiri atas 12 genotipe jagung hibrida, menggunakan rancangan acak kelompok dengan tiga ulangan. Karakter yang diamati adalah tinggi tanaman, tinggi letak tongkol, jumlah tongkol panen, bobot kupasan basah, rendemen, kadar air panen, bobot 100 biji, panjang tongkol, diameter tongkol, jumlah baris per tongkol, jumlah biji per baris, dan hasil panen biji. Hasil penelitian menunjukkan tingginya keragaman genetik karakter agronomi jagung hibrida, kecuali diameter tongkol. Hampir semua nilai heritabilitas komponen hasil termasuk tinggi, kecuali bobot tongkol panen dan diameter tongkol. Secara genotipik, pengaruh langsung karakter tinggi tanaman, tinggi letak tongkol, dan panjang tongkol terhadap hasil biji tergolong tinggi. Secara fenotipik hanya bobot tongkol panen yang berpengaruh langsung terhadap hasil biji.Kata kunci: jagung, hibrida, keragaman genetik, korelasi, heritabilitas ABSTRACTThe success of selection in plant breeding program is determined by genetic variabilities, heritability values and the correlation between agronomic characters and yield. The study aims to determine the genetic variability, heritability and the effec of agronomic characters to grain yield. The experiment was conducted in February to May 2016 in Grobogan, Central Java. The experiment consists of twelve genotypes of maize hybrids, arranged in a randomized block design with three replications. The characters observed were plant height, ear height, number of harvested ear, shelling percentage, moisture content of grain harvested, weight of 100 grains, ear length, ear diameter, number of rows per ear, number of seeds per row per ear, and grain yields. The results showed that the genetic variability of agronomic characters was broad, except ear diameter. Almost all of the heritability values of yield components were high, except harvested ear weight and ear diameter. The characters of plant height, ear height and as the genotypic gave high of a direct effect on the yield higher, while direct effect of the phenotypic character of ear hairves on grain yield are higher.

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Section: Bahan Dan Metodeunclassified

Analisis Ragam Genetik, Heritabilitas, Dan Sidik Lintas Karakter Agronomik Jagung Hibrida Silang Tunggal

Priyanto

Azrai

Syakir

2018

Informatika Pertanian

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“…Approximated t-tests were provided by the Calis procedure and were estimated by dividing the path values with the standard error of the path (Hatcher, 1994). There is no reference in the plant breeding and plant genetics literature which tests the path value (Dewey and Lu, 1959;Li 1975;Samonte et al 1998), so our estimates are probably the first. These tests, derived from path analysis used in social sciences and economics (Hatcher, 1994), will be useful to provide the most likely conclusion for interpreting and applying path analysis.…”

Section: Causal Diagrams Path Student's T-test and Sample Sizementioning

confidence: 99%

Path analysis suggests phytoene accumulation is the key step limiting the carotenoid pathway in white carrot roots

2005

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Two F 2 carrot (Daucus carota L.) populations (orange rooted Brasilia x very dark orange rooted High Carotene Mass -HCM cross and the dark orange rooted cultivated variety B493 x white rooted wild carrot Queen Anne's Lace -QAL cross) with very unrelated genetic backgrounds were used to investigate intrinsic factors limiting carotenoid accumulation in carrots by applying phenotypic correlation and path analysis to study the relationships between major root carotenes, root color and several other morphological traits. Most of the correlations between traits were close and agreed in sign between the two populations. Root weight had a moderate to highly significant positive correlation with leaf length, root length and top and middle root diameter. Although phenotypic correlations failed to identify the order of the substrates and products in the carotenoid pathway the correct order of substrates and products (phytoene → zeta-carotene → lycopene) was identified in the causal diagram of beta-carotene for the Brasilia x HCM population. Path analysis of beta-carotene synthesis in the B493 x QAL population suggested that selection for root carotenes had little effect on plant morphological traits. Causal model of beta-carotene and lycopene in the B493 x QAL population suggested that phytoene synthesis is the key step limiting the carotenoid pathway in white carrots. Path analysis, first presented by Sewall Wright to study quantitative traits, appears to be a powerful statistical approach for the identification of key compounds in complex pathways. IntroductionVitamin A deficiency is not only widespread in developing countries but is also is found in developed countries in poor urban populations and among the elderly, heavy drinkers and smokers (Giuliano et al. 2000). Consumption of horticultural crops provides more than 70% of vitamin A for the world population (Simpson, 1983), with carrots accounting for 30% of the total vitamin A precursor in countries such as the United States of America (Simon, 1992).The carotenoid biosynthetic pathway is a well established biochemical pathway which has been studied in many plants (Cunningham and Gantt, 1998;Sandmann, 1998), fungi and microorganisms (Sandmann, 1998;Armstrong, 1994). The formation of the colorless carotene phytoene from two molecules of geranylgeranyl diphosphate (GGDP) or geranylgeranyl pyrophosphate (GGPP) is the first committed step in the carotenoid pathway. Phytoene undergoes a series of four desaturation reactions that result in the sequential formation of phytofluene, zeta-carotene (ζ-carotene), neurosporene and then the redcolored lycopene. A single gene product, lycopene betacyclase (β-cyclase) (LCYB), catalyzes the formation of the bicyclic β-carotene (with two β rings) from the linear symmetrical lycopene in plants and cyanobacteria (Cunningham and Gantt, 1998) as demonstrated in studies with Erwinia herbicola and tomatoes (Sandmann, 1998). In the case of alpha-carotene (α-carotene), with one β and one epsilon (ε) ring, two different enzymes, LCYB...

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“…Multicollinearity can cause strange results when attempting to study how well individual predictor variables contribute to an understanding of the dependent variable as the effects of the predictor variables are usually confounded and this may lead to incorrect conclusion of the relationship between independent and dependent variables (Sharma, 1996;Hoe and Kim, 2004). To address this issue, sequential path analysis has been widely used by researchers for determining the relationship between yield and related traits in maize (Agrama, 1996;Mohammadi et al, 2003;Badu-Apraku et al, 2012) and in other crops such as rice (Samonte et al, 1998;2006) and sorghum (Maman et al, 2004;Ezeaku and Mohammed, 2006).…”

Section: Introductionmentioning

confidence: 99%

Trait association for improved grain yield of extra-early maturing maize hybrids evaluated in the forest and transitional zones of Ghana

Adu¹,

Akromah²,

Abdulai³

et al. 2016

Aust J Crop Sci

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The present study used sequential path analysis and factor analysis to determine the interrelationship between grain yield and other agronomic traits of 100 extra-early maturing maize genotypes. The objective was to identify traits with the greatest influence on grain yield for use as selection criteria in future breeding programmes. The coefficient of correlations revealed that grain yield correlated positively with ear aspect, days to anthesis, days to silking, plant height, and number of ears harvested per plot and plant stand. Grain yield was however, negatively correlated to husk cover and ear number per plant. Path analysis identified plant height and number of ears harvested per plot to have a positive direct effect on grain yield while ear number per plant had a negative direct effect on grain yield. Also, plant stand, number of ears harvested per plot and ear aspect were identified to have the greatest influence on yield by factor analysis.

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Path Analyses of Yield and Yield‐Related Traits of Fifteen Diverse Rice Genotypes

Cited by 140 publications

References 13 publications

Analisis Ragam Genetik, Heritabilitas, Dan Sidik Lintas Karakter Agronomik Jagung Hibrida Silang Tunggal

Analisis Ragam Genetik, Heritabilitas, Dan Sidik Lintas Karakter Agronomik Jagung Hibrida Silang Tunggal

Path analysis suggests phytoene accumulation is the key step limiting the carotenoid pathway in white carrot roots

Trait association for improved grain yield of extra-early maturing maize hybrids evaluated in the forest and transitional zones of Ghana

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