da Silva, M. A.

de A. Lira, Mário

de Araujo, G. G. L.

de Freitas, Erinaldo Viana

dos Santos, Mércia V. F.

Dubeux, José C. B., Jr.

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Qualitative Evaluation and Character Heritability of Leaf Blade and Stem from Pennisetum sp. Clones Mércia V. F. dos Santos Universidade Federal Rural de Pernambuco, Brazil M. A. da Silva Mário de A. Lira Instituto Agronômico de Pernambuco, Brazil José C. B. Dubeux Jr. Universidade Federal Rural de Pernambuco, Brazil G. G. L. de Araujo EMBRAPA, Brazil See next page for additional authors Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/12-2/10 The XXI International Grassland Congress / VIII International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. brought to you by COREView metadata, citation and similar papers at core.ac.ukprovided by University of KentuckyPresenter Information Mércia V. F. dos Santos, M. A. da Silva, Mário de A. Lira, José C. B. Dubeux Jr., G. G. L. de Araujo, and Erinaldo Viana de Freitas This event is available at UKnowledge: https://uknowledge.uky.edu/igc/21/12-2/10 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　 瞯 ]391　 瞯Grasslands/Rangelands Production Systems——— Developing Improved PlantsQualitative evaluation and character heritability of leaf blade and stem from Pennisetum sp .clonesM .V .F .dos Santos1 , M .A . da Silva , M . de A . L ira2 , J .C .B Dubeux , Jr .1 , G .G .L . de A raujo3 , E .V .de Freitas21 UFRPE , Depto . de Zootecnia , Rua Dom Manoel de Medeiros , S / N , Dois Irm本os , 52171‐900 , mercia＠ dz .uf rpe .br ; 2 IPA‐Av .Gal . San Martin , Bongi , Reci f e , PE , Braz il . 3 EMBRA PA SEMI‐áRIDO , Petrolina , PE , Braz il .Key words : chemical composition , genetic parameter , Pennisetum purpureumIntroduction Pennisetum purpureum Schum . is a tropical grass known by its adaptability to a wide range of environments andits productivity potential and forage quality . Forage nutritive value has a direct influence on animal performance . Heritability isa very important parameter to predict characters that may influence genetically forage chemical composition . The objective ofthis research was to determine the nutritive value and heritability on five Pennisetum clones under cut in the dry forest zone ofPernambuco State , Brazil .Materials and methods The experiment was carried out at the Agricultural Research Station of IPA ,located in Itambé ,PE( Lat . ０７°２５′００″S , Long . ３５°０６′００″S WGr . ; １９０ m above sea level ) . Five Pennisetum genotypes ( IRI‐３８１ , Venezuela ,Elefante B , HV‐２４１ ,and Hexaplóide)were evaluated . A staging cut was performed at the beginning of the experimentalperiod and evaluations were performed every ６０ d during the raining season and every １２０ d in the dry season , in the followingdates : １０ /１７ /０５ , １２ /１７ /０５ , ０４ /１７ /０６ , and ０６ /１７ /０６ . Representative tillers were sampled along １‐m row and separated intoleaf blade and stem . It was determined the dry matter ( DM ) , crude protein ( CP ) , neutral detergent fiber ( NDF ) , aciddetergent fiber ( ADF ) , in vitro dry matter digestibility ( IVDMD ) , mineral matter ( MM ) , ether extract ( EE ) , totalcarbohydrates ( TC) , and non‐fibrous carbohydrates ( NFC) following the methods described by Silva and Queiroz (２００２ ) . Inaddition , the heritability was also determined according Shimoya (２００２) .Results For most qualitative response variables determined in leaf blade and stem fractions , no significant ( Tukey test , P ＞ ０ .０５ ) differences among clones were observed . For leaf blade , only ADF concentration ( ０ .８４ ) and total carbohydrates ( ０ .８７ )showed high heritability , indicating that these variables could be selected in a breeding program in order to improve foragenutritive value . The coefficient of variation of these variables was low , indicating that genetic variability was more importantthan environmental variability .Table 1 Nutritive v alue , in percentage , o f Pennisetum clones lea f blade .DM CP NDF ADF IVDMD MM EE TC NFCIRI ３８１ p２０ ,０a ９ ,６a ７２ ,４a ３８ ,８ab ５８ ,２a １０ ,１a １ ,９a ７８ ,４b １１ ,７aVenezuela ２３ ,１a ８ ,１a ７３ ,１a ４０ ,１ab ５６ ,１a ８ ,６a １ ,９a ８１ ,４a １１ ,９aHexaplóide １９ ,１a ９ ,４a ７４ ,５a ４２ ,１a ５５ ,１a ９ ,５a １ ,９a ７９ ,２ab １５ ,７aHV ２４１ z２３ ,０a ９ ,１a ７２ ,７a ３２ ,７b ５５ ,４a ９ ,１a １ ,７a ７７ ,２b １８ ,８aElefante B ２５ ,３a ８ ,９a ７３ ,６a ３８ ,７ab ５８ ,７a ９ ,７a １ ,８a ７９ ,６ab １０ ,７aMean ２２ ,１ �９ ,０ ;７３ ,２ &３８ ,５ ５６ ,７ 屯９ ,４ 墘１ ,８ \７９ ,２ G１３ ,８ 8CV ( ％ ) １５ ,３ �８ ,６ ;２ ,７  ６ ,８ 忖４ ,５ 抖９ ,７ 墘３ ,９ \１ ,３ 0４８ ,０ 8H２  ０ ,６２ �０ ,６４ R０ ,３５ &０ ,８４ ０ ,５６ 屯０ ,５４ 牋０ ,５７ s０ ,８７ G０ ,４３ 8Means followed by the same letter in the same column do not differ by Tukey test ( P ＞ ０ .０５ ) .Table 2 Nutritive v alue , in percentage , o f Pennisetum clones stem .DM CP NDF ADF IVDMD MM EE TC NFCIRI ３８１ p１９ ,８a ４ ,８a ８１ ,０a ５０ ,９a ５４ ,７a １１ ,６a ０ ,６a ８２ ,５a ６ ,３aVenezuela １４ ,２a ５ ,２a ７６ ,９a ４５ ,４a ５６ ,７a １０ ,３a ０ ,７a ８３ ,７a ９ ,８aHexaplóide １５ ,５a ６ ,１a ７７ ,２a ４６ ,４a ５５ ,７a １１ ,２a ０ ,８a ８２ ,１a ６ ,５aHV ２４１ z１３ ,７a ５ ,１a ７７ ,７a ４６ ,４a ５３ ,９a １３ ,５a ０ ,７a ８０ ,９a ９ ,２aElefante B １４ ,５a ４ ,８a ７７ ,２a ４７ ,７a ５６ ,９a １１ ,８a ０ ,８a ８２ ,５a ７ ,７aMean １５ ,５ �５ ,２ ;７８ ,０ &４７ ,４ ５５ ,６ 屯１１ ,７ 牋０ ,７ \８２ ,３ G７ ,９ !CV ( ％ ) ２１ ,１ �１０ ,２ R３ ,７  ４ ,１ 忖６ ,９ 抖１１ ,２ 牋１９ ,５ s１ ,５ 0１９ ,８ 8H２  ０ ,６３ �０ ,７６ R０ ,５１ &０ ,７９ ０ ,２５ 屯０ ,７０ 牋０ ,５４ s０ ,６８ G０ ,７５ 8Means followed by the same letter in the same column do not differ by Tukey test ( P ＞ ０ .０５ ) .Conclusions Under the prevailing conditions of the dry forest zone of Pernambuco State , Brazil , the evaluated clones showedsimilar nutritive value . Heritability results suggest that ADF and total carbohydrates concentration in the leaf blade should beused in a breeding program aiming to improve forage nutritive value .ReferencesShimoya , A ; Pereira , A .V ; Reinaldo , P .F ; Cruz , C .D ; Carneiro , P .C .S . ２００２ . Repetibilidade de caracterí sticas forrageirasdo capim elefante . Scientia A grí cola , v .５９ , n .２ , p .２２７‐２３４ .Silva , D .J . ; Queiroz , A .C . ２００２ . Análise de A limentos : métodos químicos e biológicos . V i毕osa : UFV , ２３５p .

Qualitative Evaluation and Character Heritability of Leaf Blade and Stem from \u3ci\u3ePennisetum\u3c/i\u3e sp. Clones

https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=3315&amp;context=igc

Qualitative Evaluation and Character Heritability of Leaf Blade and Stem from \u3ci\u3ePennisetum\u3c/i\u3e sp. Clones

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