Scope of androgenesis for genetic improvement in rice

Abstract

Rice is an autogamous crop. A number of varieties have been bred in this crop using conventional breeding. However, further genetic improvement for seed yield is rarely being achieved as the yield potential has already reached plateau. Recently, frequent disease, pests and insect out-break particularly in areas of intensive cultivation warrants immediate attention. Besides, there is a continuous shift in consumer's preference with the change in the life style. To keep pace with these problems, there is a need to reorient the rice breeding programs in order to short-cut the breeding cycle. Production of double haploids of elite crosses following androgenesis can be a way forward to fine tune the conventional breeding. In this review, the authors stressed upon the use of androgenesis in rice for genetic improvement of tolerance to biotic and abiotic stresses, quality traits and yield per se.

Effect of silver nitrate and growth regulators to enhance anther culture response in wheat (Triticum aestivum L.)

“…The most common components or factors that significantly influence the gametophytic responses depends on donor plants and its growth conditions either in the field or in greenhouse, physical and chemicals stress pre-treatment factors, sterilization procedures, light, carbon sources, etc. [ 4 , 5 , 6 , 7 ]. Anther or microspore culture in wheat has a few impediments for haploid and double haploids production, like low response genotypes, high frequencies of albinism, and extensive time of the actuating and regenerating procedure [ [8] , [9] , [10] , [11] , [12] ].…”

Strategies and prospects of haploid induction in rice (Oryza sativa)

“…Genetic analysis revealed that most of the DH lines produced through anther culture were fertile and genetically uniform in the succeeding generations, thereby facilitating early selection (Sasmita, 2011). Till now, around 100 varieties with improved agronomic traits such as high yield, biotic and abiotic stress resistance and high‐quality content have been released through this technique (Patra et al, 2019).…”