Assessing the Quality of Seedlings in Small-scale Nurseries in the Highlands of Cameroon: The Use of Growth Characteristics and Quality Thresholds as Indicators

Takoutsing, Bertin; Tchoundjeu, Z.; Degrande, Ann; Asaah, E.; Gyau, Amos; Nkeumoe, Frederick; Tsobeng, Alain

doi:10.1007/s11842-013-9241-7

Cited by 42 publications

(40 citation statements)

References 21 publications

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“…The genotypes were scattered in no distinct and meaningful groups, either based on population and/or geographical origins ( Figure 7). The two-dimensional plot of the Principal Coordinate Analysis (PCoA) of D. edulis genotypes constructed from the 6 SSR marker data is similar in many respects to that of an AFC (factorial analysis of correspondence) plot constructed by Todou et al (2013) Takoutsing et al, 2013). In addition, transactions allow the transport of commercial fruits (seeds) for long distances in search of markets and thus farmers select fruits of good quality in order to create markets for their crops (Degrande et al, 2012).…”

Section: Principle Coordinate Analysismentioning

confidence: 72%

Genetic diversity of Dacryodes edulis provenances used in controlled breeding trials

Makueti¹,

Otieno²,

Tchoundjeu³

et al. 2015

J. Plant Breed. Crop Sci.

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Genetic diversity characterization among Dacryodes edulis accessions is important in developing genetically diverse and superior cultivars. This study assessed the genetic diversity of three D. edulis provenances used in controlled breeding trials at ICRAF-Cameroon based on SSR marker technique. Genomic DNA isolated from individual D. edulis samples were primed with six SSR primers (CB09, LD06, CG11, LB12 CE09 and CC01), amplified through PCR and the products resolved using the ABI 3730 DNA analyzer. Alleles using the Gene Mapper software were called. The polymorphism information content (PIC), gene diversity and heterozygosity estimates were computed by using PowerMarker software while GenAlEx software was employed to estimate gene flow levels, to reveal partitioning of variation across the populations and display the genetic relationships among the populations. DARwin software was used to construct a dendogram that also displayed the genetic relationships among the populations. Analysis of Molecular Variance (AMOVA) was used to assess the structure of genetic diversity among provenances. All the 6 primer pairs used in this study were polymorphic. Gene diversity values were calculated for all analyzed loci ranged from 0.

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Section: Principle Coordinate Analysismentioning

confidence: 72%

Genetic diversity of Dacryodes edulis provenances used in controlled breeding trials

Makueti¹,

Otieno²,

Tchoundjeu³

et al. 2015

J. Plant Breed. Crop Sci.

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“…Previous studies by several researchers have also found sturdiness quotient to correlate with seedling survival rate and initial growth following outplanting (Mexal and Landis 1990;Ivetić et al 2017). According to Takoutsing et al (2014), seedlings with sturdiness ratio greater than six were basically tall and thin (lanky) and etiolated, whereas a small quotient indicates sturdy plants with a higher chance of survival, particularly on windy or dry sites.…”

Section: Discussionmentioning

confidence: 99%

Influences of inorganic and organic fertilizers to morphological quality attributes of Shorea macrophylla seedlings in a tropical nursery

2019

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Abstract. Perumal M, Wasli ME, Ho SY. 2019. Influences of inorganic and organic fertilizers to morphological quality attributes of Shorea macrophylla seedlings in a tropical nursery. Biodiversitas 20: 2110-2118. Better understanding and implementation of nursery cultural regimes to improve seedling quality with high survival capability and optimal growth potential are one of the pivotal aspects of a successful forest restoration program. An experiment was set to determine the influences of inorganic and organic fertilizers on the morphological quality attributes of Shorea macrophylla (de Vriese) P.S. Ashton seedlings. For seedling production, the pots were filled with a 1:1 mixture of topsoil and sand (v:v), following the standard forest nursery practice. Either a chemical fertilizer (CF, N: P: K = 10: 26: 10) or a blend of 360-day (80% elution of the ingredients at 25°C) controlled-instant release fertilizer (CIRF, N: P: K = 10: 26: 10) or a jellyfish fertilizer (JF, N: P: K = 13.1: 1.7: 0.03) was applied at the rate of 5 g per pot. The findings revealed that the morphological quality attributes of S. macrophylla seedlings treated with JF were significantly higher (P < 0.05) than the seedlings treated with CF and CIRF at the end of nursery growing season. Notwithstanding, in terms of seedling quality indicators, seedlings from all the treatments were fit to the general expectations of a balanced root to shoot ratio values (RS < 2) and the seedlings raised in the nursery were of sub-optimal quality. Consequently, stock quality evaluation requires the integration of both morphological and physiological attributes of seedlings that provides a more effective appraisal of the fitness of seedlings to become established for field planting.

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“…The ideal value for a seedling to be considered as sturdy is less than six (Jaenicke 1999). Seedlings with sturdiness ratio greater than six were actually thin, tall and etiolated, while a small quotient indicates sturdy plants with a greater chance of survival, particularly on windy or dry sites (Takoutsing et al 2013).…”

Section: Rasprava I Zaključcimentioning

confidence: 97%

Fruit and seedling diversity among sweet chestnut (Castanea sativa Mill.) populations in Turkey

Atar

Turna

2018

Šumar. list (Online)

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Pitomi kesten, Castanea sativa Mill., plemenita je vrsta drveća od koje imamo višestruku gospodarsku korist (kvalitetno drvo, jestivi plodovi, med, ogrijev, listinac i dr.). Rasprostranjen je u mediteranskom području, od Kaspijskog jezera do Atlantskog oceana. U Turskoj najveće površine pod kestenovim šumama nalazimo na području sjeverne i zapadne Antolije te u regiji Marmara. U posljednjih nekoliko desetljeća pitomi kesten je ugrožen od raka kestenove kore i negativnih antropogenih utjecaja. S obzirom na to provedena su brojna istraživanja s ciljem očuvanje genofonda ove plemenite vrste drveća. Glavni cilj ovoga istraživanja bio je utvrditi morfološku varijabilnost plodova i jednogodišnjih sadnica pitomoga kestena u Turskoj. Plodovi za morfometrijsku analizu skupljeni su tijekom listopada u osam populacija pitomoga kestena na području istočne, središnje i zapadne Turske (slika 1, tablica 1). Unutar svake populacije sakupljeni su uzorci sa po 15 do 20 stabala. Ukupno su određene po četiri značajke na svakom plodu: dužina, širina i debljina ploda te omjer dužine i širine ploda. Osim toga, određen je i udio vlage u plodovima, kao i masa 1000 zračno suhih plodova. Plodovi su u proljeće posijani na unaprijed pripremljene gredice. Na kraju prvog vegetacijskog razdoblja mjerene su sljedeće značajke: visina sadnice, promjer sadnice pri osnovi i koeficijent čvrstoće. Za utvrđivanje varijabilnosti populacija korištene su deskriptivne i multivarijatne statističke metode. Podaci su obrađeni u programskom paketu SPSS 23.0. Rezultati deskriptivne statističke analize prikazani su na slici 2. Najviše vrijednosti za dužinu, širinu i debljinu ploda utvrđene su u populaciji Izmira, dok su najviše prosječne vrijednosti za visinu sadnice, promjer sadnice pri njenoj osnovi i koeficijent čvrstoće utvrđene u populaciji Balikesira. Masa 1000 zračno suhih plodova kretala se je od 3815,1 g do 10516,5 g, a udio vlage u plodovima od 38.46 % do 52,21 % (tablica 2). Istraživanjem je utvrđen visok stupanj varijabilnosti populacija pitomoga kestena u Turskoj (slika 3). Rezultati provedene analize varijance pokazali su da se populacije međusobno signifikantno razlikuju za sve istraživane značajke. Pearsonovim koeficijentom korelacije utvrđena je statistički značajna korelacija između dužine, širine i debljine ploda, kao i mase 1000 zračno suhih plodova (tablica 3). Osim toga, pozitivna korelacija utvrđena je i između visine sadnice i koeficijenta čvrstoće. Duncanovim testom i hijerarhijskom klasterskom analizom utvrđeno je da se one populacije koje su geografski bliže i ekološki sličnije nalaze u istoj skupini (slika 1 i 4). Također je utvrđeno da se veličina plodova u kestenovim šumama Turske povećava od istoka prema zapadu.

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Assessing the Quality of Seedlings in Small-scale Nurseries in the Highlands of Cameroon: The Use of Growth Characteristics and Quality Thresholds as Indicators

Cited by 42 publications

References 21 publications

Genetic diversity of Dacryodes edulis provenances used in controlled breeding trials

Genetic diversity of Dacryodes edulis provenances used in controlled breeding trials

Influences of inorganic and organic fertilizers to morphological quality attributes of Shorea macrophylla seedlings in a tropical nursery

Fruit and seedling diversity among sweet chestnut (Castanea sativa Mill.) populations in Turkey

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