w. i.\\\i;i;\(;i. i:\i.i. s. - tiik i\iii;i;it\m:k ok >ii:.\sri;K\iii.K chaiiactkiis ok curiii.N. 



THE INHERITANCE OF IV.EASUREABLE CHARACTERS IN HYBRIDS BETWEEN 

 REPUTED SPECIES OF COTTON 



llv W. Lawrence BALLS. .\1. A. 



c.r SI. JipIimV 



aiiist lo llic Ki 



uWr 



iihrid^'ef îleinlir 

 rnincnl Itepailn 



il.- rii.slilHl Ivyiiln 



'l'Iic' cliicr inloicsl (>!' Ilie l'oseai-rlics wliicli I hâve carrieil mil duriiii; Llie 

 pasi seveii years on liybrids oC Eiivplian liy American rollon. is ihic lo llic 

 widely divorufenl phylo^eny of llio [)aienls. \\ lien 

 discussing l'ie titic of lliis article willi Mr. W. Ha- 

 leson, I was advisetl l)y liini lo ([uaiiCy liie words 

 « Sperics-liylirid », on ai-cniml of liie cuUivaled 

 |)a>l (il' IIk' parcnlal shains. The qualiricalion 

 « rcpiilrd » has ihci-crori^ liccii insei-lcd. hnl al 

 llie saine lime I sliuiihl hkc il lu lie iiiideislood 

 clearly, Ihal e\ en Ihoiij^h Ihe pai'enlsare not ahove 

 suspicion \vilh regard lo Ihe spécifie naliireof llieir 

 dilTerences, yel Ihey are slill so widely dill'erenl 

 thaï |iersons whose expérience has been conlined 

 lo Ihe Egyplian crop hâve acinally failed al Hrsl 

 glance lo recognise American Ujilands (such as 

 « King ») for cotlon planls al ail. 



The nalure of Ihe available évidence,' from 

 wliich I propose lo (luole a few of Ihe most inle- 

 resling daln, while eonlining Ihe quolations lo 

 Ihose mallers which lie nearest to the fronlier of 

 research, is by no means sali-^l'acloiy. This is due In Ihe 

 the investigalions, combineil wilh insufficienl facililies. 

 wriling, our facililies hâve lieen eqiial lo a thoroiigli shidy ol 

 allelomorphic pairs in inter-Egyplian crosses, wliilc \\ c lia\ 



l'Iiol. r.lrnl.t 



M. 1^ 



ind lit ions design of 



l p lo the lime of 



Dîne liall'-dozen 



icliiallv endea- 



\(iiire(l h) recdid llie fnll(>sl possible évidence as lo ail Ihe recognisable charac- 

 lers iiniihcd in Ihe inherilance of coinplex liybrids. Kvrn under thèse circum- 

 slances, crilical évidence might hâve been oblained, had il not been for furllier 

 lediiclion of Ihe numbers by Ihe act of vicinism. or naliiral crossing. In only 

 onc respeci liave wc been (|iiile siiccesslnl. naniely. in giving a definile expres- 

 sion to the probable enor of onr rcsnlls. In c\i'iy possilile characler \ve bave 

 iised slatislical methodsof expression. inaUing as inany déterminations of every 

 measuremenl as our facililies wouUI permit, and conirolling thèse by comprari- 

 soii wilh Ihe results oblained by idenlical nielhods from pure slrains. 



The data oblained in thèse control determinalions are of inleresl Ihein- 

 selves, since lliey forin a lenglhy séries of slatislics regarding lluclualioii in 

 the cotlon planl. 



Slatislical metliods hâve been of the utmost service, in so far as I hâve 

 been able to utilise them. Nevertheiess, it becoines more and more clear as 

 lime goes on, thaï even in lliis [)arliciilar pièce of research. which lies on the 

 l)0undarv-line belween Memlelisiii and riioiiiclrv, slatislical nii'lliods caii onlv b<> 



