Pigeonpea improvement: An amalgam of breeding and genomic research

In the past five decades, constant research has been directed towards yield improvement in pigeonpea resulting in the deployment of several commercially acceptable cultivars in India. Though, the genesis of hybrid technology, the biggest breakthrough, enigma of stagnant productivity still remains unsolved. To sort this productivity disparity, genomic research along with conventional breeding was successfully initiated at ICRISAT. It endowed ample genomic resource providing insight in the pigeonpea genome combating production constraints in a precise and speedy manner. The availability of the draft genome sequence with a large‐scale marker resource, oriented the research towards trait mapping for flowering time, determinacy, fertility restoration, yield attributing traits and photo‐insensitivity. Defined core and mini‐core collection, still eased the pigeonpea breeding being accessible for existing genetic diversity and developing stress resistance. Modern genomic tools like next‐generation sequencing, genome‐wide selection helping in the appraisal of selection efficiency is leading towards next‐generation breeding, an awaited milestone in pigeonpea genetic enhancement. This paper emphasizes the ongoing genetic improvement in pigeonpea with an amalgam of conventional breeding as well as genomic research.     

建筑用竹结构的强度和弹性

印度南部特别是卡纳塔卡利用小刺竹建造房屋。本文对刺竹的强度和弹性进行了调查,并研究了竹构件的压缩强度、抗折性和振动性进行试验,从而得到弹性摸量。竹构件的压缩强度在31 Mpa到47 Mpa之间,弹性摸量在20 000 Mpa~40 000 Mpa之间,通过抗折性和振动性实验,得出压缩弹性摸量低于拉力摸量的结论。剪应强度在4 Mpa~11 Mpa之间。当应变力为0.6%时,小刺竹的抗折强度为60 Mpa。竹子的平均压力低于10 Mpa。     

Effect of slag-based gypsum (SBG) and commercial gypsum (CG) on nutrient availability,uptake and yield of rice (Oryza sativa L.) in two different soils

Paddy and Water Environment - Slag-based gypsum (SBG) is a synthesized product of steel industry. SBG has better plant nutritional value in terms of sulphur (S), calcium (Ca), phosphorus (P), iron...     

Cellulase production by Aspergillus unguis in solid state fermentation

Lignocellulosic substrates are a good carbon source and provide rich growth media for a variety of microorganisms which prodLuce industrially important enzymes. Cellulases are a group of hydrolytic enzymes such as filter paperase (FPase), carboxymethyl cellulase(CMCase) andβ-glucosidase-responsible for release of sugars in the bioconversion of the lignocellulosic biomass into a variety of value-added products. This study examined cellulase production by a newly isolated Aspergillus unguis on individual lignocellulosic substrates in solid state fermentation (SSF). The maximum peak production of enzymes varied from one substrate to another, however,based on the next best solid support and local availability of groundnut fodder supported maximum enzyme yields compared with other solid supports used in this study.Groundnut fodder supported significant production of FPase (5.9 FPU/g of substrate), CMCase (1.1 U/g of substrate) andβ-glucosidase activity (6.5 U/g of substrate) in SSF. Considerable secretion of protein (27.0 mg/g of substrate) on groundnut fodder was recorded. Constant increment of protein content in groundnut fodder due to cultivation of A. unguis is an interesting observation and it has implications for the improvement of nutritive value of groundnut fodder for cattle.