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.tgo advocated the ploDondelance of DoD-ailtutlv€ typ6 ol<br />

gene action for yleld, boll nurbor, giDing outtur .nil<br />

tint lndex. crosa shorinE 6lqnllicant sca lor yi.1it<br />

involvod hlqh r h19h, hlsh r ror, hlqh x av.rrge abd lou<br />

x avq.g€ Gca par4ts rhich €uggaatsd involvd4t of<br />

t1xab16 rnd non-flxabt€ g€n€tic e!!€cts,<br />

calg dl al. (1937) studisd Bcr and Bc2 o! thB<br />

crosE ol 1414 x LC5393. Wh1le l'414 tas us6d 66.<br />

recurr.nt pa!€nt fo! eight yl,ald 6rd quallty, tEalts. In<br />

th€ lc2, epistaEl. *as s!9r1!icart !o! seeil. cottoD ylelit,<br />

1lnt lD(i€x and a€ed IndAxt but vas not 61gnl €rt ao!<br />

.ny ch.racter 1! tha Bc1. addltive elfect 16!€<br />

slsniflc.nt tor Eoue t!.itE in both qen€lltionsi<br />

itori.anca eflecla uela Blqniflcant oDly !o! qiDnlng<br />

outtun (ln both s€neratlon).<br />

Ghafoo! anil Y\han (1937) conductod coDbi.1ng<br />

ability .na1y616 lor yi6ld and ltr coDponeDk in a 5x5<br />

iliauel c!os6 oxpellEent and !6po!ted that th€ GcA<br />

effscta u€le loutrrl to be highly aiqrificant in boll<br />

{elght only. vrhlla 6ca salsctE vs!€ found to !e hlghly<br />

5igniflc.nt for mln 6teE h€iqht, sldpodt.t b!anqh€.,<br />

nu!l,e! of borrs p€! plant and Eaed cotton yl€ld t6r<br />

plant, plaveallng th. naturs of E.n. actlon to b.

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