000 03210nam a22004217a 4500
001 81238
003 MX-TxCIM
005 20170719154814.0
008 121211s ||||f| 0 p|p||0|| |
020 _a970-648-116-8
040 _aMX-TxCIM
072 0 _aE16
072 0 _aF30
090 _aLook under series title
100 1 _aKumar, R.
_uAsian Regional Maize Workshop, 8: New Technologies for the New Millennium
110 0 _aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico, DF (Mexico)
111 2 _aProceedings of the Asian Regional Maize Workshop
_cBangkok (Thailand)
_d5-8 Aug 2002
245 0 0 _aInheritance of resistance to banded leaf and sheath blight (Rhizoctonia solani f.sp. sasakii) of maize (Zea mays l.)
260 _aMexico, DF (Mexico)
300 _ap. 356-365
340 _aPrinted
520 _aOne of the main deterrents to high grain yield in maize is its susceptibility to several diseases. Banded leaf and Sheath blight (BLSB) caused by Rhizoctonia solani .(f. sp. sasakii) has become a serious threat to its cultivation in the north -western plains of India. The pathogen spreads from the basal sheath to the developing ear under favorable environmental conditions. The developing ear is completely damaged and dries up prematurely with caking of husk leaves. The main objective was to work out the inheritance of resistance to this biotic stress. Inheritance of resistance to BLSB was studied based on the analysis of 10 crosses. Eight crosses were between 2 resistant (CM104 and CML1) and 4 susceptible inbred lines (Tarun (x)- 36-1-1-1-2-1-4, D741(x)- 1-1-1-10-4- 4, Pop31 (x)-21-l-2-4-l-l-5-l/13 # and Tarun (x)- 252-1-2-2-1-2-1). In addition, one resistant x resistant and one susceptible x susceptible cross was also studied. Parents, F1's, F2's, and backcrosses, were included in the present study. Final evaluation was undertaken under artificially created epiphytotic conditions. The F2 segregation pattern for BLSB reaction was 15:l in crosses involving CM104 as the resistant parent, and 13:3 in crosses involving CML1 as the resistant parent. The BC1 P1 segregation pattern exhibited a 3:1 ratio. The resistant x resistant and susceptible x susceptible crosses followed all: 0 and 0: all for resistance and susceptibility, respectively. The F2 segregation analysis of eight susceptible x resistant crosses revealed that resistance was governed by two genes. The BLSB reaction in F2 and backcrosses involving CM 104 and susceptible lines suggested that resistance in CM 104 was controlled by duplicate dominant genes while crosses of CML1 showed dominance and recessive interaction.
546 _aEnglish
591 _a0502|AGRIS 0501|AL-Maize Program
593 _aJuan Carlos Mendieta
595 _aCPC
650 1 0 _aGenetic resistance
650 1 0 _aGrain yield
650 1 0 _aInheritance (genetics)
650 1 0 _aMaize
650 1 0 _aPlant diseases
650 1 0 _aRhizoctonia solani
653 0 _aCIMMYT
650 1 0 _91314
_aZea mays
700 1 _aSingh, I.S.,
700 1 _aSrinivasan, G.|Zaidi, P.H.|Prasanna, B.M.|Gonzalez, F.|Lesnick, K.
942 _cPRO
999 _c7473