Line × Tester combining ability analysis involving five lines (cultivars i.e., CIM-446, CIM-473, CIM-506, CIM-554 and SLH-284) and three testers (cultivars viz., CIM-496, CIM-499 and CIM-707) was carried out during 2015 and 2016 to determine the inheritance for earliness, yield and lint traits in upland cotton. Genotypes revealed significant (P≤0.01) variations for all the traits. On average, F 1 hybrids showed the significant increase over parental means for yield traits. Mean squares due to general (GCA) and specific combining ability (SCA) were highly significant, which suggested that additive and non-additive gene actions were involved in controlling all the characters. However, the preponderance of non-additive type of gene action observed for majority of the traits. Lines (SLH-284, CIM-473) and pollinators (CIM-707, CIM-496) were leading general combiners for majority of the traits. F 1 hybrids (CIM-473 × CIM-496, SLH-284 × CIM-707 and CIM-446 × CIM-496) which involve best general combiners, showed the leading performance for yield and lint traits. Heritability was moderate to high with appreciable genetic gain for majority of the traits. Except for lint %, the correlation of seed cotton yield was positive with other traits. The significance of additive and non-additive components suggested integrated breeding strategies with delayed selection for development of cotton hybrids with improvement in earliness and seed cotton yield.

ABSTRACT. Mixed inheritance analysis using joint segregation analysis (JSA) for stripe rust (Puccinia striiformis f. sp. tritici) resistance was carried out in six basic populations (P 1 , F 1 , P 2 , BC 1 , BC 2 and F 2 ) of four wheat crosses (Hashim-08 × LU-26, Farid-06 × Shafaq, Parula × Blue Silver, TD-1 × D-97603) during crop season 2009 to 2012. Genes controlling stripe rust resistance were assessed by using area under disease progress curve (AUDPC). The AUDPC was controlled by mixed two additive-dominant-epistatic major genes plus additive-dominant-epistasis of polygenes in cross Hashim-08 × LU-26 (model E), while in Farid-06 × Shafaq, it was controlled by mixed two major additive-dominant genes plus additive-dominant polygenes (model E-2). In cross Parula × Blue Silver, the AUDPC was managed by additive, dominance and epistasis of two major genes (model B-1), however, it was controlled by mixed one major gene and additive dominant polygenes in cross TD-1 × D-97603 (model D-1). Genetic variation and heritability was higher in major genes than polygene for all the crosses showing that AUDPC was mainly controlled by major genes. The genetic behavior of the AUDPC revealed that stripe rust resistance was controlled by mixed interaction of one to two major genes plus polygenes. Análise da herança mista da resistência do trigo à ferrugem linear (Puccinia striiformis f. sp. tritici) por meio da análise conjunta da segregação RESUMO. Foi utilizada a análise conjunta da segregação (JSA) para o estudo da herança mista da resistência do trigo à ferrugem linear (Puccinia striiformis f. sp. tritici), a partir de seis populações (P1, F1, P2, RC1, RC2 e F2) obtidas de quatro cruzamentos de trigo (Hashim-08 × LU-26; Farid-06 × Shafaq; Parula × Blue Silver e TD-1 × D-97603), entre as safras 2009 e 2012. O efeito dos genes que controlam a resistência do trigo à ferrugem linear foi avaliado pela área formada sob a curva de progressão da doença (ASCPD). No cruzamento entre Hashim-08 e LU-26, o controle foi exercido por dois genes principais de efeito aditivo-dominante-epistático, mais o efeito de poligenes aditivos-dominantes-epistáticos (modelo E). No cruzamento Farid-06 × Shafaq, a resistência foi controlada por dois genes aditivos-dominantes principais e também por poligenes aditivosdominantes (modelo E-2). No cruzamento Parula× Blue Silver, a ASCPD indicou uma resistência controlada por dois genes principais de efeito aditivo, dominante e epistático (modelo B-1). No cruzamento TD-1 × D-97603, a ASCPD permitiu inferir um controle decorrente da ação de um único gene maior, acrescido ao efeito de poligenes aditivos dominantes (modelo D-1). Considerando que o efeito dos genes principais sobre a variação genética e herdabilidade foi superior ao efeito dos poligenes, para todos os híbridos, a ASCPD dependeu principalmente da expressão dos genes maiores. O padrão genético indicado pela ASCPD permitiu concluir que a resistência do trigo à ferrugem linear foi decorrente da interação de um a dois genes principais com os poligenes...

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, seed weight pod -1 , 100-grain weight, above ground biomass, seed yield and harvest index. The results of correlation analysis showed that seed yield plant -1 had strong positive genotypic association with pods plant -1 , seed weight pod -1 , 100 seed weight and biological yield under both production environments and high positive genotypic association with secondary branches plant -1 , seeds pod -1 , biological yield and harvest index under irrigated condition only. Path coefficient analysis confirmed the true relationship of pods plant -1 , seed weight pod -1 , under irrigated condition and seed weight pod -1 , harvest index and above ground biomass under rainfed condition. Hence, these characters could be used as selection criterion for further improvement in seed yield of chickpea.

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