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    Agronomic Evaluation of Eight Genotypes of Hot Pepper

    (Capsicum Spp L.) in a Coastal Savanna Zone of Ghana

    anuel /watei 0uartey+1

    onder Nune$eu+ atilda )wusu-Ansah

    +

    Andrew Sarodie A$$iah2 noch Selor /ofi )fori3 Harry ensah Aoatey4

    +.Nuclear Agriculture 5esearch 6entre, Biotechnology and Nuclear Agriculture 5esearch Institute, 7hana

    Atoic nergy 6oission, #. ). Bo8 97 !, 9egon-Accra

    2.Biotechnology 6entre, Biotechnology and Nuclear Agriculture 5esearch Institute, 7hana Atoic nergy

    6oission, #. ). Bo8 97 !, 9egon-Accra

    3.5adiation ntoology and #est anageent 6entre, Biotechnology and Nuclear Agriculture 5esearch

    Institute, 7hana Atoic nergy 6oission, #. ). Bo8 97 !, 9egon-Accra

    4.7raduate School of Nuclear and Allied Sciences, :ni;ersity of 7hana, Atoic 6a$us, #. ). Bo8 A +

    Atoic nergy

    1-ail of the corres$onding author< ea=uart>yahoo.co

    Astract

    9ocal landrace ;arieties of $e$$er "Capsicums$% often fail to eet the e8$ectations of farers with res$ect to

    fruit yield, while e8otic ?reeds are unada$ted to local conditions, with detriental effects on local $e$$er

    $roduction. @he ai of the study was to assess the agronoic $erforance of eight "!% $e$$er genoty$es,

    co$rising e8otic and 2 local genoty$es, under rain-fed conditions to identify those suita?le for culti;ation

    locally. @he e8$erient was conducted ?etween A$ril and )cto?er 2++ at the research far of the

    Biotechnology and Nuclear Agriculture 5esearch Institute of the 7hana Atoic nergy 6oission. @he

    5andoied 6o$lete Bloc esign "56B%, with three re$licates was used. eed control was carried out

    anually with the aid of a hoe and a cutlass at 4 and + wees after $lanting "A#%. )ne a$$lication of +&-+&-

    +& N#/ fertilier was ade at 2 A#, using a rate of 2 g ha-+

    . No $esticides or fungicides were a$$lied.#araeters easured include nu?er of days to &C flowering, height at first ?ranching, total $lant height at

    aturity, cano$y s$read at aturity and total yield. 5esults indicate that e8otic hy?rid ;arieties atured earlier

    than the local genoty$es. @hey also $erfored ?etter in ters of fruit weight, fruit length and fruit yield.

    Howe;er, the two local landrace ;arieties, Anloga and 9egon +!, $roduced the highest nu?er of undaaged

    fruits.!ey"or#s$Capsicums$, genoty$es, e8otic $e$$er, landrace, yield, $lant height, fruit weight

    %. &ntro#uction

    #e$$er "Capsicum sp.%, also widely nown as chilli, is an i$ortant cro$ consued all o;er the world and

    ?elongs to the faily Solanaceae. It is ?elie;ed to ha;e originated fro and doesticated in the Aericas o;er

    , years ago. @hough its fruits are considered to ?e ;egeta?les, ?otanically they are ?erries. #e$$er fruits are

    the ost widely consued as a s$ice. @hough there are a?out 2&-3 s$ecies of 6a$sicu, Capsicum annuumisthe ost widely culti;ated s$ecies "Belletti et al., +''!, 6sillDry, 2, 5a;ishanar et al., 23%.

    In 7hana, $e$$er is an ine;ita?le constituent in the diets of any $eo$le. @he nutriti;e ;alue of the cro$

    is highE it is an e8cellent source of ;itains A, B-co$le8, 6 "ascor?ic acid%, and along with inerals lie

    oly?denu, anganese, folate, $otassiu and thiaine. Soe $e$$er ;arieties ha;e ?een noted to contain

    se;en ties ore ;itain 6 than orange "9ee and /ader, 2%. Beta-carotenoids, and ;itains A and 6 in

    $e$$er are $owerful antio8idants that destroy free radicals "Sionne et al., +''F%.@he cro$ is culti;ated for its fruits which are used locally or e8$orted to destinations in uro$e.

    6urrently, culti;ation is on the decline as a result of incidence of $est and disease conditions, inade=uate use of

    fertilisers, inade=uate irrigation facilities, lac of an organied syste for ;egeta?le $rocessing and areting

    and the low incoe deri;ed ?y farers during the regular growing seasons "Anon, 2+2E illenniu

    e;elo$ent Authority, 2+%. @he a?sence of a ;ia?le seed industry for ;egeta?le cro$s "including $e$$er% has$a;ed the way for the unrestricted i$ortation of e8otic seed ?y local seed co$anies to fill the ga$.

    6onse=uently, farers ha;e access to ?oth landraces as well as e8otic ;arieties for coercial

    $roduction of $e$$er. @he local landraces are drought tolerant, and ha;e long aturity $eriods ?ut are inherently

    low yielding with long aturity $eriods. @he e8otic ;arieties are unada$ted to local growing conditions and

    easily succu? to the ;agaries of the weather and other a?iotic and ?iotic deterinants of yield there?y

    $erforing way ?elow e8$ectation. In the a?sence of current and relia?le agronoic data on the $erforances of?oth local and e8otic genoty$es, farers are liely to continue culti;ating culti;arsGgenoty$es with low

    econoic $otential.@his study was, thus, conducted to e;aluate si8 e8otic $e$$er genoty$es against two local checs in

    order to identify su$erior genoty$es with desira?le growth and yield characteristics under $re;ailing field

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    conditions. @he outcoe of this study should $ro;ide $lant ?reeders with the inforation necessary for ?reeding

    of new ;arieties.

    '. etho#

    2.+Area of Study

    @he study was conducted at the Biotechnology and Nuclear Agriculture 5esearch Institute of the 7hana Atoicnergy 6oission ?etween A$ril and )cto?er 2++. @he study site was located a?out 2 north of Accra

    "& 4 N and +3 %, with an ele;ation of F a?o;e sea le;el. @he ;egetation is 6oastal Sa;annah,

    and the area is characteried ?y a ?iodal rainfall $attern with the aor season falling ?etween the onths of

    arch and June, and a inor rainy season around )cto?erGNo;e?er each year. @he ean annual rainfall is !+

    distri?uted o;er less than ! days, and te$eratures are oderate with a8iu rarely e8ceeding 32 6

    while the iniu does not fall ?elow +F 6.

    2.2Experimental MaterialSi8 e8otic and two indigenous genoty$es were used for the study. @he choice of aterials was ?ased on their

    wides$read culti;ation and econoic i$ortance. escri$tions of the genoty$es used are shown in @a?le + and

    Kigure +.

    2.3 Layout of experimentA$$ro8iately one hundred and fifty "+&% seeds of each genoty$e were sown in a nursery cell tray filled with awell-i8ed su?strate of 3

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    ;alues of 23-3 A@ for ?irds eye $e$$er to achie;e &C flowering. )ther worers re$orted ;alues ranging 4-

    4& A@ "5o?erts and Ho$e, 24%, &4-&F A@ "ochiah et al ., 2+2%, &-2 A@ "Booalfa et al., 2'%, -

    F4 A@ "*alade-Bustos et al., 2'%, +-!3 A@ "9aw-)g?oo and 9aw-)g?oo, 2+%, and !-F& A@

    "I=?al et al., 2'% for ;arious genoty$es of $e$$er to achie;e &C flowering.

    @he aturity $eriod of a cro$ is a ;ery i$ortant factor considered in the choice of $lanting aterial

    "ewitt and 5osaland, 2'%. Karers in regionsGdistrictsGareas with short rainy $eriods $refer early-aturing;arieties to a;oid cro$ loss.

    3.2 $ei#%t at &irst 'ranc%in#

    @here was significant ;ariation aong genoty$es for height at first ?ranching as shown in Kig. 3. Archard

    ?ranched at a height of 2 c which was significantly shorter than the height at which all other genoty$es

    ?ranched. Anloga recorded the greatest height at first ?ranching "3 c% which was not statistically different

    fro the height at which Sunny K+, Kore;er+ and 9egon +! achie;ed first ?ranching. Height at first ?ranching

    has a direct ?earing on cano$y height and the tendency of ?ranches in the lower cano$y to droo$. :nder high?earing, fruits fro such cano$ies ay touch the soil, $redis$osing the to infection fro soil icroorganiss

    there?y reducing =uality of har;est "Ahad et al., 2+3E Barth et al., 2'E Bela?ir et al., +''!E Snowden,

    +'!%.

    3.3 (lant %ei#%t at maturityAong all the genoty$es studied, Big Sun recorded the highest $lant height at aturity of !+. c whileBo?ardier recorded the least "&2.F c%. ifferences aong genoty$es for $lant height at aturity were

    statistically significant "Kig 3%. @hese results are consistent with the re$orts ?y other worers "Booalfa et al.,

    2'E 9ah?i? et al., 2+3E I=?al et al., 2'E 5o?erts and Ho$e, 24%. )n the other hand, other re$orts indicate

    a;erage $lant height at aturity in the ranges of +.-&F. c "Nsa?iyera et al., 2+2%, 23.!-2&.2 c "ochiah

    et al., 2+2%, 32.+-!.3 c "Nansah et al., 2++%, -' c "ewitt and 5osaland, 2'% and F2 -++F c

    "*alade-Bustos et al., 2'%. 5udall "+''4% stated that increase in $lant height is acco$anied ?y a

    corres$onding increase in ste girthGthicness, ?oosting the $lants resistance against lodging. 7enoty$ic

    differences ay account for ;ariation in $lant height in this study as e8$lained ?y ecoteau and 7raha "+''4%.

    3.4 Canopy "idt% at maturity

    ean cano$y width of the genoty$es is shown in Kig. &. 6ano$y width ;aried fro .'& c in Sunny K+ to

    ++.! c in Archard. ifferences in cano$y width aong genoty$es were statistically significant. 6ano$y

    width ;aries aong $e$$er genoty$es as re$orted ?y Booalfa et al. "2'% and 5o?erts and Ho$e "24%.

    Nansah et al. "2++% re$orted cano$y width ;alues of 3.2 -!3.3 c aong ?irds eye $e$$er genoty$es. @he

    findings in this study are inconsistent with those of Nsa?iyera et al."2+2% who re$orted a;erage cano$y width

    of 3& genoty$es of $e$$er in :ganda to ;ary fro +.! - +.F c.

    ifferences in cano$y width aong $e$$er ;arieties are ost often associated with differences in

    ;arietiesGgenoty$es, nutrition, soil oisture a;aila?ility, age of seedlings at trans$lanting and $lanting distances

    "ecoteau and 7raha, +''4E Nsa?iyera et al. 2+2%. :sually $lants with sall cano$y width ae u$ for this

    deficiency with u$right growth. 9arge cano$y width $ro;ides large leaf area surfaces which enhance the

    interce$tion of solar radiation with su?se=uent increase in the aount of $hotosynthetic acti;ities, which

    corres$ondingly increases the $lants assiilatory a?ility ")ra and ller, 24%.

    3.5 &ruit )ei#%t *unripe and red+ amon# #enotypes

    ean fruit weight of har;ested sa$les "unri$e and red% is shown in Kig. . 9egon +! recorded the least fruit

    weights of .'4 g and .43g, while Kore;er K+recorded the highest "of +'.'' g and +'.&g% in the unri$e and ri$e

    states res$ecti;ely. @hese were not significantly different fro ;alues recorded for Big Sun, Antillas and

    Archard. Howe;er, ;alues recorded for Anloga, Bo?ardier, Sunny K+and 9egon +! were significantly lower at?oth the unri$e and ri$e state. In general, ean fruit weight of genoty$es reduced fro the green aturity state

    to the ri$e state, e8ce$t for the genoty$es Anloga and Big Sun. Kor instance ean fruit weights of Antillas and

    Bo?adier significantly reduced fro +.4 g to+4.! g, +.+g to !.! g and 44. g to 4+.! g res$ecti;ely. Kor all

    genoty$es, differences in ean fruit weight aong the green atured and ri$e fruits were statistically highly

    significant "$O.+%. Siilar results ha;e ?een re$orted ?y other worers "Booalfa et al., 2'E 5o?erts and

    Ho$e, 24%. Howe;er, results re$orted in this study are higher than those re$orted ?y @esfaw et al ."2+3% andNsa?iyera et al. "2+2%.

    3., &ruit diameter *unripe and red+ amon# #enotypes

    *ariation in ean fruit diaeter of the $e$$er genoty$es is shown in Kig. F. Kruit diaeter ;aried fro +.+ c

    "Sunny K+% to 4.+& c "Big Sun% in atured green fruits. Siilarly, in the ri$e state, the sae trend was o?ser;ed

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    with Sunny K+recording an a;erage fruit diaeter of .'F c while Big Sun recorded an a;erage fruit diaeter

    of 4.+ c. ith the e8ce$tion of Kore;er K+, all other genoty$es recorded a reduction in fruit diaeter in the

    ri$e and unri$e state. Highly significant differences in fruit diaeter e8isted aong the genoty$es in ?oth the

    unri$e and ri$e fruits. any earlier worers "Nsa?iyera et al., 2+2E Nansah et al., 2++E Seen et al., 2++%,

    using different s$ecies of $e$$er, o?ser;ed ;ariation in ean fruit diaeter. Hence, the ;ariation in this trait

    a$$ears to ?e in res$onse to genoty$ic differences ?ut ay also ?e influenced ?y the factors which also affectcano$y width "ecoteau and 7raha, +''4E Nsa?iyera et al. 2+2%.

    3.- &ruit Len#t% *nripe and ripe+ amon# #enotypes

    ifferences in ean fruit length aong the genoty$es are shown in Kig. !. Antillas recorded the shortest fruit

    length, of 4. c and 4.' c in the unri$e and ri$e fruits res$ecti;ely, while Kore;er K +, which recorded +&.! c

    and +. c for fruit length in the unri$e and ri$e states res$ecti;ely, had the longest fruits. ith the e8ce$tion

    of Archard and Bo?adier, all other genoty$es recorded an increase in fruit length fro the unri$e to the ri$e

    state. Highly significant differences e8isted aong genoty$es for ean fruit length in ?oth unri$e and ri$e states.Kruit length is an i$ortant $araeter in deterining $e$$er fruit =uality, es$ecially for e8$ort "Nsa?iyera et al.,

    2+2%. Kore;er K+ and Sunny K+, ?oth hy?rids, had the longest fruits. @he results are consistent with those

    o?tained ?y other researchers "Idowu-Agida et al., 2+E Serenli and a;i, 2+E A*56, 24E Ainci and

    Ainci, 24%.

    3./ &les% 0%icness *nripe and ripe+ amon# #enotypesean flesh thicness of fruits at the unri$e and ri$e states of the genoty$es is shown in Kig. '. Sunny K +, with

    ;alues of .+4 c and .+2 c in the unri$e and ri$e fruits res$ecti;ely, recorded the least flesh thicness aong

    the genoty$es while Kore;er K+, with ;alues of .2 c and .+! c, had the thicest fruits. @here were

    significant differences in flesh thicness aong genoty$es in ?oth unri$e and ri$e states. *alues re$orted in this

    study are consistent with those re$orted ?y Nansah et al. "2++%, ?ut conflict with those re$orted ?y Booalfa

    et al. "2'% and 9ah?i? et al. "2+3%. In all genoty$es, e8ce$t 9egon +!, flesh thicness reduced with ri$ening.

    Klesh thicness $lays an i$ortant role in the $rocessing of $e$$er. In 7hana, where ost of the fruits of $e$$er

    are $rocessed ?y sun-drying, thic-fleshed fruits re=uire longer drying $eriods which ay $redis$ose the to

    fungal infection under su?-o$tial conditions of huidity and te$erature. )n the other hand, $e$$er fruits with

    thin flesh are tender and lia?le to daage during $ost-har;est handling, there?y reducing their =uality as fresh

    $roduce for e8$ort destinations.

    3. umer of Seeds per fruit amon# #enotypes

    Kig. + shows differences in ean nu?er of seeds $er fruit aong genoty$es, ranging fro 2 in Bo?adier to

    +&3 in Kore;er K+. No significant differences were o?ser;ed in ean nu?er of seeds aong Archard, Sunny K +,

    Antillas, 9egon +!, Big Sun and Bo?ardier. ean nu?er of seeds $er fruit recorded in this study was

    consistent with the findings of Nsa?iyera et al. "2+2% and Ainci and Ainci "24%. ifferences in ean

    nu?er of seeds aong $e$$er genoty$es are ainly genetic, although stress related conditions such as drought

    and i?alanced soil $H can also affect seed nu?er "Nsa?iyera et al., 2+2E Seen et al., 2++%%. Kor the food

    industry, low seeded fruits are $referred o;er hea;ily seeded fruits.

    3.1 0otal numer of fruits per plant amon# #enotypesKig. ++ shows ;ariation in total nu?er of fruits $er $lant aong the eight genoty$es of $e$$er studied, further

    categoriation into daaged and undaaged fruits. Bo?adier recorded the least nu?er of undaaged

    fruitsG$lant "+2.+% while 9egon +! $roduced the highest "!+.&F%. ean nu?er of fruitsG$lant aong genoty$es

    was statistically significant for total nu?er of fruits $er $lant as well as nu?er of undaaged fruits $er $lant

    ?ut not for the daaged. Kor daaged fruits, Anloga recorded the least nu?er with a ean of ++.F, while

    Archard recorded the highest "2F.3%. @otal nu?er of fruits $er $lant was statistically significant aonggenoty$es and highest in 9egon +! "'4.3% and least in Big Sun "24.'F%. @his is siilar to the re$ort of Nsa?iyera

    et al. "2+2% who recorded ean fruit nu?ers in the range +2-'+ for soe accessions of hot $e$$er, ?ut

    contrasts with that of Nansah et al."2++% who re$orted ;alues of +43-4&. Kruit nu?er is usually influenced

    ?y ?oth genoty$ic and en;ironental conditions "Seen et al., 2++%.

    Archard, which ?ranched early and e8hi?ited a $rostrate growth ha?it, recorded the highest nu?er of

    daaged fruits resulting fro contact with the soil. Kore;er K+, which recorded the hea;iest fruit weight, alsorecorded a high nu?er of daaged fruits. Hea;y load of fruits caused the ?ranches to droo$, with fruits in the

    lower cano$y touching the soil and there?y $redis$osing the to soilP?orne $athogens "Kig. +2%.

    3.11 0otal fruit yield per %ectare amon# #enotypes

    *ariation in total fruit yield $er hectare aong genoty$es, e8tra$olated fro yield $er $lot, is $resented in Kig.

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    +3. @his is further $artitioned into daaged and undaaged fruit yield $er hectare. Kore;er K+howe;er recorded

    the highest total fruit yield of '.&3 t ha-+

    while Bo?adier recorded the least with 3.& tonGha. ifferences in

    total yield aong the genoty$es are statistically significant. aaged fruit yield ranged fro .!4 t ha-+

    in 9egon

    +! to &.32 t ha-+

    in Kore;er K+. ifferences in yield of daaged fruit $er hectare aong genoty$es were also

    statistically significant. :ndaaged fruit yield $er hectare ranged fro +.4' t ha-+

    to .! t ha-+

    in Bo?ardier and

    Anloga res$ecti;ely with significant differences aong genoty$es. Aong all genoty$es only Kore;er K+recorded ore daaged fruits than undaaged fruits. Significant differences e8isted in yield of daaged fruits

    aong the genoty$es. oring with 3& genoty$es of hot $e$$er, Nsa?iyera et al."2+2% re$orted total fruit yield

    in the range +.-+F.' t ha-+

    . Nansah et al. "2++% recorded ;alues ?etween +.4-3'.3 t ha-+

    . Seen et al. "2++%

    also re$orted fruit yield of 2+.3'-3&.'2 t ha-+ in cayenne $e$$er. In @aiwan, Jordan and @anania, total fruit

    yield of $e$$er has ?een re$orted to ;ary fro &.4-3&.2& t ha-+

    , , !.&-2F.2 t ha-+

    and +.-3!.4 t ha-

    +res$ecti;ely "A*56, 24%, indicating that results fro the current study co$are $oorly with those re$orted

    fro these other regions. Anloga, a farers ;ariety "landrace%, recorded the highest undaaged fruit yield $er

    hectare, reflecting its su$erior ada$tation to local conditions co$ared to the other genoty$es.

    0. Conclusion

    @he e8otic $e$$er genoty$es out-$erfored the local genoty$es with reference to days to &C flowering, fruit

    length, fruit weight, fruit diaeter, flesh thicness and total fruit yield ?ut recorded higher nu?er of daaged

    fruits. @wo local landraces, 9egon +! and Anloga, recorded the highest nu?er of undaaged fruits $er $lantand $er hectare res$ecti;ely. @he two ay ?e used in future ?reeding wor.

    Ac1no"le#gement

    Authors are grateful to the staff of the Biotechnology and Nuclear Agriculture 5esearch Institute of the 7hana

    Atoic nergy 6oission for the hel$ recei;ed during the course of the research.

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    re$roducti;e e;aluation of hot $e$$ers under different $lastic ulches in $olyG$lastic tunnel. (a. . A#ri. Sci.:

    4,*2+ ++3-++'.

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    (lant. 4&

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    ISSN 2224-32! "#a$er% ISSN 222&-'3( ")nline%

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    Kigure +. 5i$e fruits of $e$$er genoty$es used in the study< "a% Anloga, "?% Sunny K+, "c% Kore;er K+, "d% 9egon

    +!, "e% Archard, "f% Bo?adier, "g% Antillas and "h% Big Sun.

    Kigure 2. ays to &C flowering aong genoty$es

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    Kigure 4. #lant height at aturity aong genoty$es

    Kigure 3. Height at first ?ranching aong genoty$es

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    Kigure . Kruit weight "g% of the genoty$es

    Kigure &. 6ano$y width at aturity aong genoty$es

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    Kigure F. Kruit diaeter "c% of the genoty$es

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    Kigure+. Nu?er of SeedsG$er fruit aong genoty$es

    Kigure'. Klesh thicness "c% of the $e$$er genoty$es

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    Figure 12. Fruits of Forever F1showing extent of damage

    Kigure ++. Nu?er of fruitsG$lant aong genoty$es

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    Kigure +3. Lield of $e$$er genoty$es in t ha-+

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