W. A. OIITIIN. - TIIK l)i;\KI,(»l'\li:\ï (i|- hlSKASK IIKSISTWT \ AIIIKTIKS UK l'I.ANÏS. 'J.Vi 



Uiru selpclioii. U\bri(liz;\lioii was nol Iduiicl noccssary- riicsearch l'or résis- 

 tant stocks \vas niade in tiie worsl iiilccli'd areas. 01' the mimerons individnal 

 plants selected, only,4hose \vere prescrved which prodnced l'esislant progeny in 

 llie Ibllowingseason. Al'tcr a nnmberof rcsislaniraniiliesliad boen securcd. fur- 

 Iher sélections wcre made on llieliasis of necessary commercial qiialities. Tlic 

 most important of thèse are ( I i/ii'/d : delermincd by Ibe wcight of Ihe progeny 

 riiwralJiri' Ihaii liy llial ni' llic iiidi\ idiial plan! : Si Prrceii/. of. Uni to mcciI, deler- 



0. Cili-oi] m- sidi-li liiL'Imi, llie ijulleii ].iarenL ol' the hybrid. 

 l'ig. (i. — Mcliin citron (stock nielon), le parent mâle de l'hybride. 



mined i)y yiiiiiin^ the enlire yield ol' a planl or ol' a progeny row, the examina- 

 tion otsmall samples having been proved to give faliacious resulls; (â) She of 

 hoU, determined by weighing the seed collon l'rom ten or more bolls. Measn- 

 rements of bolls are of no conséquence; (i) Uniformily, delermined by exa- 

 mining the length of lint and habit of growlh before Ihe picking and Ihe color 

 of the seed covering afler ginning; (.")) l.rngth of Uni, which in Sea Islandcotton 

 is a character of primary importance, is delermined by combing ont Ihe lint on 

 several seeds from dilferenl bolls. Tlic seveiai xarieliivs Ihat bave been lired 

 will now be brielly descril)ed : 



Of Upland Cotton. (Gossypium niRsun m.) I. Iiillon. A variely characle- 

 rized as follows : — Plant tall, ereci, will resislani, productive, often withone, 

 two or Ihree large basai branches. Friiiling limbs reduced to clusters of bolls 

 close to main stalk. Leaves mediinn size ; bolls of médium size, 9() being 

 required lo yield 1 pound of seed colldii. Bolls erecI, seed small, average 

 weight of 100 seeds Dgrams, covcrcd wilh close, brownish green fuzz. Staple 

 médium lo short, 7/8 lo I inch, white. slraight,percenlage of lintto seed cotton 

 .17.4-. Developed from the Jackson Limbless by sélection begun in 1900. Il 



(lu Meli[o.ls of llrecdiii;; for IlistMsr [•„■ 

 Plant Rreoding as a Faclor in ComIihII 



vol. I. PII. G!l-7'2. 

 lii'oeding Discase liesislanl Plants, .inn 

 On Ihe Tlieory ond Praclice of Bivcdin 



cintioii, vol. 4, pp. 144-150. 



iistMiir,.. l'ro, 

 n^ Plant Ilis 



lluil. Sciciirr. Ii)07. p. '28. 

 Anteiirnn lîrecdrrs. Axsociafton. 



iiiiii llienlcif. Associalivii, vol. 1, pp. 'iOi-liOT. 

 Discase liesislaiil Plaîits, Americiiii lirceclcrs, Asio- 



